diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.py b/erpnext/accounts/doctype/payment_entry/payment_entry.py
index 0c21aae..ff00fde 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.py
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.py
@@ -183,6 +183,13 @@
 					d.reference_name, self.party_account_currency)
 
 				for field, value in iteritems(ref_details):
+					if d.exchange_gain_loss:
+						# for cases where gain/loss is booked into invoice
+						# exchange_gain_loss is calculated from invoice & populated 
+						# and row.exchange_rate is already set to payment entry's exchange rate
+						# refer -> `update_reference_in_payment_entry()` in utils.py
+						continue
+
 					if field == 'exchange_rate' or not d.get(field) or force:
 						d.db_set(field, value)
 
@@ -664,8 +671,8 @@
 				gl_entries.append(gle)
 
 			if self.unallocated_amount:
-				base_unallocated_amount = self.unallocated_amount * \
-					(self.source_exchange_rate if self.payment_type=="Receive" else self.target_exchange_rate)
+				exchange_rate = self.get_exchange_rate()
+				base_unallocated_amount = (self.unallocated_amount * exchange_rate)
 
 				gle = party_gl_dict.copy()
 
@@ -806,10 +813,17 @@
 
 		if account_details:
 			row.update(account_details)
+		
+		if not row.get('amount'):
+			# if no difference amount
+			return
 
 		self.append('deductions', row)
 		self.set_unallocated_amount()
 
+	def get_exchange_rate(self):
+		return self.source_exchange_rate if self.payment_type=="Receive" else self.target_exchange_rate
+
 	def initialize_taxes(self):
 		for tax in self.get("taxes"):
 			validate_taxes_and_charges(tax)
diff --git a/erpnext/accounts/doctype/payment_entry_reference/payment_entry_reference.json b/erpnext/accounts/doctype/payment_entry_reference/payment_entry_reference.json
index 912ad09..43eb0b6 100644
--- a/erpnext/accounts/doctype/payment_entry_reference/payment_entry_reference.json
+++ b/erpnext/accounts/doctype/payment_entry_reference/payment_entry_reference.json
@@ -14,7 +14,8 @@
   "total_amount",
   "outstanding_amount",
   "allocated_amount",
-  "exchange_rate"
+  "exchange_rate",
+  "exchange_gain_loss"
  ],
  "fields": [
   {
@@ -90,12 +91,19 @@
    "fieldtype": "Link",
    "label": "Payment Term",
    "options": "Payment Term"
+  },
+  {
+   "fieldname": "exchange_gain_loss",
+   "fieldtype": "Currency",
+   "label": "Exchange Gain/Loss",
+   "options": "Company:company:default_currency",
+   "read_only": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-02-10 11:25:47.144392",
+ "modified": "2021-04-21 13:30:11.605388",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Payment Entry Reference",
diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index c1cc092..b99d75e 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -451,6 +451,7 @@
 			self.get_asset_gl_entry(gl_entries)
 
 		self.make_tax_gl_entries(gl_entries)
+		self.make_exchange_gain_loss_gl_entries(gl_entries)
 		self.make_internal_transfer_gl_entries(gl_entries)
 
 		self.allocate_advance_taxes(gl_entries)
diff --git a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
index 189260a..db6f143 100644
--- a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
@@ -974,6 +974,120 @@
 		acc_settings.submit_journal_entriessubmit_journal_entries = 0
 		acc_settings.save()
 
+	def test_gain_loss_with_advance_entry(self):
+		unlink_enabled = frappe.db.get_value(
+			"Accounts Settings", "Accounts Settings",
+			"unlink_payment_on_cancel_of_invoice")
+		
+		frappe.db.set_value(
+			"Accounts Settings", "Accounts Settings",
+			"unlink_payment_on_cancel_of_invoice", 1)
+
+		original_account = frappe.db.get_value("Company", "_Test Company", "exchange_gain_loss_account")
+		frappe.db.set_value("Company", "_Test Company", "exchange_gain_loss_account", "Exchange Gain/Loss - _TC")
+
+		pay = frappe.get_doc({
+			'doctype': 'Payment Entry',
+			'company': '_Test Company',
+			'payment_type': 'Pay',
+			'party_type': 'Supplier',
+			'party': '_Test Supplier USD',
+			'paid_to': '_Test Payable USD - _TC',
+			'paid_from': 'Cash - _TC',
+			'paid_amount': 70000,
+			'target_exchange_rate': 70,
+			'received_amount': 1000,
+		})
+		pay.insert()
+		pay.submit()
+
+		pi = make_purchase_invoice(supplier='_Test Supplier USD', currency="USD",
+			conversion_rate=75, rate=500, do_not_save=1, qty=1)
+		pi.cost_center = "_Test Cost Center - _TC"
+		pi.advances = []
+		pi.append("advances", {
+			"reference_type": "Payment Entry",
+			"reference_name": pay.name,
+			"advance_amount": 1000,
+			"remarks": pay.remarks,
+			"allocated_amount": 500,
+			"ref_exchange_rate": 70
+		})
+		pi.save()
+		pi.submit()
+
+		expected_gle = [
+			["_Test Account Cost for Goods Sold - _TC", 37500.0],
+			["_Test Payable USD - _TC", -40000.0],
+			["Exchange Gain/Loss - _TC", 2500.0]
+		]
+
+		gl_entries = frappe.db.sql("""
+			select account, sum(debit - credit) as balance from `tabGL Entry`
+			where voucher_no=%s
+			group by account
+			order by account asc""", (pi.name), as_dict=1)
+		
+		for i, gle in enumerate(gl_entries):
+			self.assertEqual(expected_gle[i][0], gle.account)
+			self.assertEqual(expected_gle[i][1], gle.balance)
+
+		pi_2 = make_purchase_invoice(supplier='_Test Supplier USD', currency="USD",
+			conversion_rate=73, rate=500, do_not_save=1, qty=1)
+		pi_2.cost_center = "_Test Cost Center - _TC"
+		pi_2.advances = []
+		pi_2.append("advances", {
+			"reference_type": "Payment Entry",
+			"reference_name": pay.name,
+			"advance_amount": 500,
+			"remarks": pay.remarks,
+			"allocated_amount": 500,
+			"ref_exchange_rate": 70
+		})
+		pi_2.save()
+		pi_2.submit()
+
+		expected_gle = [
+			["_Test Account Cost for Goods Sold - _TC", 36500.0],
+			["_Test Payable USD - _TC", -38000.0],
+			["Exchange Gain/Loss - _TC", 1500.0]
+		]
+
+		gl_entries = frappe.db.sql("""
+			select account, sum(debit - credit) as balance from `tabGL Entry`
+			where voucher_no=%s
+			group by account order by account asc""", (pi_2.name), as_dict=1)
+
+		for i, gle in enumerate(gl_entries):
+			self.assertEqual(expected_gle[i][0], gle.account)
+			self.assertEqual(expected_gle[i][1], gle.balance)
+
+		expected_gle = [
+			["_Test Payable USD - _TC", 70000.0],
+			["Cash - _TC", -70000.0]
+		]
+
+		gl_entries = frappe.db.sql("""
+			select account, sum(debit - credit) as balance from `tabGL Entry`
+			where voucher_no=%s and is_cancelled=0
+			group by account order by account asc""", (pay.name), as_dict=1)
+
+		for i, gle in enumerate(gl_entries):
+			self.assertEqual(expected_gle[i][0], gle.account)
+			self.assertEqual(expected_gle[i][1], gle.balance)
+
+		pi.reload()
+		pi.cancel()
+
+		pi_2.reload()
+		pi_2.cancel()
+
+		pay.reload()
+		pay.cancel()
+
+		frappe.db.set_value("Accounts Settings", "Accounts Settings", "unlink_payment_on_cancel_of_invoice", unlink_enabled)
+		frappe.db.set_value("Company", "_Test Company", "exchange_gain_loss_account", original_account)
+
 	def test_purchase_invoice_advance_taxes(self):
 		from erpnext.buying.doctype.purchase_order.test_purchase_order import create_purchase_order
 		from erpnext.accounts.doctype.payment_entry.payment_entry import get_payment_entry
diff --git a/erpnext/accounts/doctype/purchase_invoice_advance/purchase_invoice_advance.json b/erpnext/accounts/doctype/purchase_invoice_advance/purchase_invoice_advance.json
index 5801b17..63dfff8 100644
--- a/erpnext/accounts/doctype/purchase_invoice_advance/purchase_invoice_advance.json
+++ b/erpnext/accounts/doctype/purchase_invoice_advance/purchase_invoice_advance.json
@@ -1,235 +1,127 @@
 {
- "allow_copy": 0, 
- "allow_import": 0, 
- "allow_rename": 0, 
- "beta": 0, 
- "creation": "2013-03-08 15:36:46", 
- "custom": 0, 
- "docstatus": 0, 
- "doctype": "DocType", 
- "document_type": "Document", 
- "editable_grid": 1, 
+ "actions": [],
+ "creation": "2013-03-08 15:36:46",
+ "doctype": "DocType",
+ "document_type": "Document",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "reference_type",
+  "reference_name",
+  "remarks",
+  "reference_row",
+  "col_break1",
+  "advance_amount",
+  "allocated_amount",
+  "exchange_gain_loss",
+  "ref_exchange_rate"
+ ],
  "fields": [
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "reference_type", 
-   "fieldtype": "Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 0, 
-   "label": "Reference Type", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "journal_voucher", 
-   "oldfieldtype": "Link", 
-   "options": "DocType", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "180px", 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "fieldname": "reference_type",
+   "fieldtype": "Link",
+   "label": "Reference Type",
+   "no_copy": 1,
+   "oldfieldname": "journal_voucher",
+   "oldfieldtype": "Link",
+   "options": "DocType",
+   "print_width": "180px",
+   "read_only": 1,
    "width": "180px"
-  }, 
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 3, 
-   "fieldname": "reference_name", 
-   "fieldtype": "Dynamic Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 1, 
-   "label": "Reference Name", 
-   "length": 0, 
-   "no_copy": 1, 
-   "options": "reference_type", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0
-  }, 
+   "columns": 3,
+   "fieldname": "reference_name",
+   "fieldtype": "Dynamic Link",
+   "in_list_view": 1,
+   "label": "Reference Name",
+   "no_copy": 1,
+   "options": "reference_type",
+   "read_only": 1
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 3, 
-   "fieldname": "remarks", 
-   "fieldtype": "Text", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 1, 
-   "label": "Remarks", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "remarks", 
-   "oldfieldtype": "Small Text", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "150px", 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "columns": 3,
+   "fieldname": "remarks",
+   "fieldtype": "Text",
+   "in_list_view": 1,
+   "label": "Remarks",
+   "no_copy": 1,
+   "oldfieldname": "remarks",
+   "oldfieldtype": "Small Text",
+   "print_width": "150px",
+   "read_only": 1,
    "width": "150px"
-  }, 
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "reference_row", 
-   "fieldtype": "Data", 
-   "hidden": 1, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 0, 
-   "label": "Reference Row", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "jv_detail_no", 
-   "oldfieldtype": "Date", 
-   "permlevel": 0, 
-   "print_hide": 1, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "80px", 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "fieldname": "reference_row",
+   "fieldtype": "Data",
+   "hidden": 1,
+   "label": "Reference Row",
+   "no_copy": 1,
+   "oldfieldname": "jv_detail_no",
+   "oldfieldtype": "Date",
+   "print_hide": 1,
+   "print_width": "80px",
+   "read_only": 1,
    "width": "80px"
-  }, 
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "col_break1", 
-   "fieldtype": "Column Break", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 0, 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "col_break1",
+   "fieldtype": "Column Break"
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 2, 
-   "fieldname": "advance_amount", 
-   "fieldtype": "Currency", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 1, 
-   "label": "Advance Amount", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "advance_amount", 
-   "oldfieldtype": "Currency", 
-   "options": "party_account_currency", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "100px", 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "columns": 2,
+   "fieldname": "advance_amount",
+   "fieldtype": "Currency",
+   "in_list_view": 1,
+   "label": "Advance Amount",
+   "no_copy": 1,
+   "oldfieldname": "advance_amount",
+   "oldfieldtype": "Currency",
+   "options": "party_account_currency",
+   "print_width": "100px",
+   "read_only": 1,
    "width": "100px"
-  }, 
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 2, 
-   "fieldname": "allocated_amount", 
-   "fieldtype": "Currency", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 1, 
-   "label": "Allocated Amount", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "allocated_amount", 
-   "oldfieldtype": "Currency", 
-   "options": "party_account_currency", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "100px", 
-   "read_only": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "columns": 2,
+   "fieldname": "allocated_amount",
+   "fieldtype": "Currency",
+   "in_list_view": 1,
+   "label": "Allocated Amount",
+   "no_copy": 1,
+   "oldfieldname": "allocated_amount",
+   "oldfieldtype": "Currency",
+   "options": "party_account_currency",
+   "print_width": "100px",
    "width": "100px"
+  },
+  {
+   "fieldname": "exchange_gain_loss",
+   "fieldtype": "Currency",
+   "label": "Exchange Gain/Loss",
+   "options": "Company:company:default_currency",
+   "read_only": 1
+  },
+  {
+   "fieldname": "ref_exchange_rate",
+   "fieldtype": "Float",
+   "label": "Reference Exchange Rate",
+   "non_negative": 1,
+   "read_only": 1
   }
- ], 
- "hide_heading": 0, 
- "hide_toolbar": 0, 
- "idx": 1, 
- "image_view": 0, 
- "in_create": 0, 
-
- "is_submittable": 0, 
- "issingle": 0, 
- "istable": 1, 
- "max_attachments": 0, 
- "menu_index": 0, 
- "modified": "2016-08-26 02:30:54.407138", 
- "modified_by": "Administrator", 
- "module": "Accounts", 
- "name": "Purchase Invoice Advance", 
- "owner": "Administrator", 
- "permissions": [], 
- "quick_entry": 1, 
- "read_only": 0, 
- "read_only_onload": 0, 
- "sort_order": "DESC", 
- "track_seen": 0
+ ],
+ "idx": 1,
+ "index_web_pages_for_search": 1,
+ "istable": 1,
+ "links": [],
+ "modified": "2021-04-20 16:26:53.820530",
+ "modified_by": "Administrator",
+ "module": "Accounts",
+ "name": "Purchase Invoice Advance",
+ "owner": "Administrator",
+ "permissions": [],
+ "quick_entry": 1,
+ "sort_field": "modified",
+ "sort_order": "DESC"
 }
\ No newline at end of file
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 55a5b99..8889913 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -13,7 +13,7 @@
 from erpnext.stock.doctype.delivery_note.delivery_note import update_billed_amount_based_on_so
 from erpnext.projects.doctype.timesheet.timesheet import get_projectwise_timesheet_data
 from erpnext.assets.doctype.asset.depreciation \
-	import get_disposal_account_and_cost_center, get_gl_entries_on_asset_disposal
+	import get_disposal_account_and_cost_center, get_gl_entries_on_asset_disposal, get_gl_entries_on_asset_regain
 from erpnext.stock.doctype.batch.batch import set_batch_nos
 from erpnext.stock.doctype.serial_no.serial_no import get_serial_nos, get_delivery_note_serial_no
 from erpnext.setup.doctype.company.company import update_company_current_month_sales
@@ -149,7 +149,7 @@
 					if self.update_stock:
 						frappe.throw(_("'Update Stock' cannot be checked for fixed asset sale"))
 
-					elif asset.status in ("Scrapped", "Cancelled", "Sold"):
+					elif asset.status in ("Scrapped", "Cancelled") or (asset.status == "Sold" and not self.is_return):
 						frappe.throw(_("Row #{0}: Asset {1} cannot be submitted, it is already {2}").format(d.idx, d.asset, asset.status))
 
 	def validate_item_cost_centers(self):
@@ -840,6 +840,7 @@
 		self.make_customer_gl_entry(gl_entries)
 
 		self.make_tax_gl_entries(gl_entries)
+		self.make_exchange_gain_loss_gl_entries(gl_entries)
 		self.make_internal_transfer_gl_entries(gl_entries)
 
 		self.allocate_advance_taxes(gl_entries)
@@ -917,22 +918,33 @@
 		for item in self.get("items"):
 			if flt(item.base_net_amount, item.precision("base_net_amount")):
 				if item.is_fixed_asset:
-					asset = frappe.get_doc("Asset", item.asset)
-
+					if item.get('asset'):
+						asset = frappe.get_doc("Asset", item.asset)
+					else:
+						frappe.throw(_(
+							"Row #{0}: You must select an Asset for Item {1}.").format(item.idx, item.item_name), 
+							title=_("Missing Asset")
+						)
 					if (len(asset.finance_books) > 1 and not item.finance_book
 						and asset.finance_books[0].finance_book):
 						frappe.throw(_("Select finance book for the item {0} at row {1}")
 							.format(item.item_code, item.idx))
 
-					fixed_asset_gl_entries = get_gl_entries_on_asset_disposal(asset,
-						item.base_net_amount, item.finance_book)
+					if self.is_return:
+						fixed_asset_gl_entries = get_gl_entries_on_asset_regain(asset,
+							item.base_net_amount, item.finance_book)
+						asset.db_set("disposal_date", None)
+					else:
+						fixed_asset_gl_entries = get_gl_entries_on_asset_disposal(asset,
+							item.base_net_amount, item.finance_book)
+						asset.db_set("disposal_date", self.posting_date)
 
 					for gle in fixed_asset_gl_entries:
 						gle["against"] = self.customer
 						gl_entries.append(self.get_gl_dict(gle, item=item))
 
-					asset.db_set("disposal_date", self.posting_date)
-					asset.set_status("Sold" if self.docstatus==1 else None)
+					self.set_asset_status(asset)
+				
 				else:
 					# Do not book income for transfer within same company
 					if not self.is_internal_transfer():
@@ -958,6 +970,12 @@
 			erpnext.is_perpetual_inventory_enabled(self.company):
 			gl_entries += super(SalesInvoice, self).get_gl_entries()
 
+	def set_asset_status(self, asset):
+		if self.is_return:
+			asset.set_status()
+		else: 	
+			asset.set_status("Sold" if self.docstatus==1 else None)
+
 	def make_loyalty_point_redemption_gle(self, gl_entries):
 		if cint(self.redeem_loyalty_points):
 			gl_entries.append(
diff --git a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
index fe531d3..6dc2767 100644
--- a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
@@ -10,6 +10,7 @@
 from erpnext.stock.doctype.stock_entry.test_stock_entry import make_stock_entry, get_qty_after_transaction
 from erpnext.accounts.doctype.purchase_invoice.test_purchase_invoice import unlink_payment_on_cancel_of_invoice
 from erpnext.accounts.doctype.pos_profile.test_pos_profile import make_pos_profile
+from erpnext.assets.doctype.asset.test_asset import create_asset, create_asset_data
 from erpnext.exceptions import InvalidAccountCurrency, InvalidCurrency
 from erpnext.stock.doctype.serial_no.serial_no import SerialNoWarehouseError
 from frappe.model.naming import make_autoname
@@ -1069,6 +1070,36 @@
 		self.assertFalse(si1.outstanding_amount)
 		self.assertEqual(frappe.db.get_value("Sales Invoice", si.name, "outstanding_amount"), 1500)
 
+	def test_gle_made_when_asset_is_returned(self):
+		create_asset_data()
+		asset = create_asset(item_code="Macbook Pro")
+	
+		si = create_sales_invoice(item_code="Macbook Pro", asset=asset.name, qty=1, rate=90000)
+		return_si = create_sales_invoice(is_return=1, return_against=si.name, item_code="Macbook Pro", asset=asset.name, qty=-1, rate=90000)
+
+		disposal_account = frappe.get_cached_value("Company", "_Test Company", "disposal_account")
+
+		# Asset value is 100,000 but it was sold for 90,000, so there should be a loss of 10,000
+		loss_for_si = frappe.get_all(
+			"GL Entry", 
+			filters = {
+				"voucher_no": si.name,
+				"account": disposal_account
+			},
+			fields = ["credit", "debit"]
+		)[0]
+
+		loss_for_return_si = frappe.get_all(
+			"GL Entry", 
+			filters = {
+				"voucher_no": return_si.name,
+				"account": disposal_account
+			},
+			fields = ["credit", "debit"]
+		)[0]
+
+		self.assertEqual(loss_for_si['credit'], loss_for_return_si['debit'])
+		self.assertEqual(loss_for_si['debit'], loss_for_return_si['credit'])
 
 	def test_discount_on_net_total(self):
 		si = frappe.copy_doc(test_records[2])
@@ -2087,9 +2118,9 @@
 	if not gst_account:
 		gst_settings.append("gst_accounts", {
 			"company": "_Test Company",
-			"cgst_account": "CGST - _TC",
-			"sgst_account": "SGST - _TC",
-			"igst_account": "IGST - _TC",
+			"cgst_account": "Output Tax CGST - _TC",
+			"sgst_account": "Output Tax SGST - _TC",
+			"igst_account": "Output Tax IGST - _TC",
 		})
 
 	gst_settings.save()
@@ -2106,7 +2137,7 @@
 
 	si.append("taxes", {
 		"charge_type": "On Net Total",
-		"account_head": "CGST - _TC",
+		"account_head": "Output Tax CGST - _TC",
 		"cost_center": "Main - _TC",
 		"description": "CGST @ 9.0",
 		"rate": 9
@@ -2114,7 +2145,7 @@
 
 	si.append("taxes", {
 		"charge_type": "On Net Total",
-		"account_head": "SGST - _TC",
+		"account_head": "Output Tax SGST - _TC",
 		"cost_center": "Main - _TC",
 		"description": "SGST @ 9.0",
 		"rate": 9
@@ -2164,6 +2195,7 @@
 		"rate": args.rate if args.get("rate") is not None else 100,
 		"income_account": args.income_account or "Sales - _TC",
 		"expense_account": args.expense_account or "Cost of Goods Sold - _TC",
+		"asset": args.asset or None,
 		"cost_center": args.cost_center or "_Test Cost Center - _TC",
 		"serial_no": args.serial_no,
 		"conversion_factor": 1
diff --git a/erpnext/accounts/doctype/sales_invoice_advance/sales_invoice_advance.json b/erpnext/accounts/doctype/sales_invoice_advance/sales_invoice_advance.json
index 14bf4d8..29422d6 100644
--- a/erpnext/accounts/doctype/sales_invoice_advance/sales_invoice_advance.json
+++ b/erpnext/accounts/doctype/sales_invoice_advance/sales_invoice_advance.json
@@ -1,235 +1,128 @@
 {
- "allow_copy": 0, 
- "allow_import": 0, 
- "allow_rename": 0, 
- "beta": 0, 
- "creation": "2013-02-22 01:27:41", 
- "custom": 0, 
- "docstatus": 0, 
- "doctype": "DocType", 
- "document_type": "Document", 
- "editable_grid": 1, 
+ "actions": [],
+ "creation": "2013-02-22 01:27:41",
+ "doctype": "DocType",
+ "document_type": "Document",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "reference_type",
+  "reference_name",
+  "remarks",
+  "reference_row",
+  "col_break1",
+  "advance_amount",
+  "allocated_amount",
+  "exchange_gain_loss",
+  "ref_exchange_rate"
+ ],
  "fields": [
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "reference_type", 
-   "fieldtype": "Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 0, 
-   "label": "Reference Type", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "journal_voucher", 
-   "oldfieldtype": "Link", 
-   "options": "DocType", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "250px", 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "fieldname": "reference_type",
+   "fieldtype": "Link",
+   "label": "Reference Type",
+   "no_copy": 1,
+   "oldfieldname": "journal_voucher",
+   "oldfieldtype": "Link",
+   "options": "DocType",
+   "print_width": "250px",
+   "read_only": 1,
    "width": "250px"
-  }, 
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 3, 
-   "fieldname": "reference_name", 
-   "fieldtype": "Dynamic Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 1, 
-   "label": "Reference Name", 
-   "length": 0, 
-   "no_copy": 1, 
-   "options": "reference_type", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 1, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0
-  }, 
+   "columns": 3,
+   "fieldname": "reference_name",
+   "fieldtype": "Dynamic Link",
+   "in_list_view": 1,
+   "label": "Reference Name",
+   "no_copy": 1,
+   "options": "reference_type",
+   "print_hide": 1,
+   "read_only": 1
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 3, 
-   "fieldname": "remarks", 
-   "fieldtype": "Text", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 1, 
-   "label": "Remarks", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "remarks", 
-   "oldfieldtype": "Small Text", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "150px", 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "columns": 3,
+   "fieldname": "remarks",
+   "fieldtype": "Text",
+   "in_list_view": 1,
+   "label": "Remarks",
+   "no_copy": 1,
+   "oldfieldname": "remarks",
+   "oldfieldtype": "Small Text",
+   "print_width": "150px",
+   "read_only": 1,
    "width": "150px"
-  }, 
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "reference_row", 
-   "fieldtype": "Data", 
-   "hidden": 1, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 0, 
-   "label": "Reference Row", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "jv_detail_no", 
-   "oldfieldtype": "Data", 
-   "permlevel": 0, 
-   "print_hide": 1, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "120px", 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "fieldname": "reference_row",
+   "fieldtype": "Data",
+   "hidden": 1,
+   "label": "Reference Row",
+   "no_copy": 1,
+   "oldfieldname": "jv_detail_no",
+   "oldfieldtype": "Data",
+   "print_hide": 1,
+   "print_width": "120px",
+   "read_only": 1,
    "width": "120px"
-  }, 
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "col_break1", 
-   "fieldtype": "Column Break", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 0, 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "col_break1",
+   "fieldtype": "Column Break"
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 2, 
-   "fieldname": "advance_amount", 
-   "fieldtype": "Currency", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 1, 
-   "label": "Advance amount", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "advance_amount", 
-   "oldfieldtype": "Currency", 
-   "options": "party_account_currency", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "120px", 
-   "read_only": 1, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "columns": 2,
+   "fieldname": "advance_amount",
+   "fieldtype": "Currency",
+   "in_list_view": 1,
+   "label": "Advance amount",
+   "no_copy": 1,
+   "oldfieldname": "advance_amount",
+   "oldfieldtype": "Currency",
+   "options": "party_account_currency",
+   "print_width": "120px",
+   "read_only": 1,
    "width": "120px"
-  }, 
+  },
   {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 2, 
-   "fieldname": "allocated_amount", 
-   "fieldtype": "Currency", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 1, 
-   "label": "Allocated amount", 
-   "length": 0, 
-   "no_copy": 1, 
-   "oldfieldname": "allocated_amount", 
-   "oldfieldtype": "Currency", 
-   "options": "party_account_currency", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "print_width": "120px", 
-   "read_only": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0, 
+   "columns": 2,
+   "fieldname": "allocated_amount",
+   "fieldtype": "Currency",
+   "in_list_view": 1,
+   "label": "Allocated amount",
+   "no_copy": 1,
+   "oldfieldname": "allocated_amount",
+   "oldfieldtype": "Currency",
+   "options": "party_account_currency",
+   "print_width": "120px",
    "width": "120px"
+  },
+  {
+   "fieldname": "exchange_gain_loss",
+   "fieldtype": "Currency",
+   "label": "Exchange Gain/Loss",
+   "options": "Company:company:default_currency",
+   "read_only": 1
+  },
+  {
+   "fieldname": "ref_exchange_rate",
+   "fieldtype": "Float",
+   "label": "Reference Exchange Rate",
+   "non_negative": 1,
+   "read_only": 1
   }
- ], 
- "hide_heading": 0, 
- "hide_toolbar": 0, 
- "idx": 1, 
- "image_view": 0, 
- "in_create": 0, 
-
- "is_submittable": 0, 
- "issingle": 0, 
- "istable": 1, 
- "max_attachments": 0, 
- "menu_index": 0, 
- "modified": "2016-08-26 02:36:10.718057", 
- "modified_by": "Administrator", 
- "module": "Accounts", 
- "name": "Sales Invoice Advance", 
- "owner": "Administrator", 
- "permissions": [], 
- "quick_entry": 1, 
- "read_only": 0, 
- "read_only_onload": 0, 
- "sort_order": "DESC", 
- "track_seen": 0
+ ],
+ "idx": 1,
+ "index_web_pages_for_search": 1,
+ "istable": 1,
+ "links": [],
+ "modified": "2021-06-04 20:25:49.832052",
+ "modified_by": "Administrator",
+ "module": "Accounts",
+ "name": "Sales Invoice Advance",
+ "owner": "Administrator",
+ "permissions": [],
+ "quick_entry": 1,
+ "sort_field": "modified",
+ "sort_order": "DESC"
 }
\ No newline at end of file
diff --git a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
index 8e6952a..6690bda 100644
--- a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
+++ b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
@@ -743,7 +743,6 @@
    "fieldname": "asset",
    "fieldtype": "Link",
    "label": "Asset",
-   "no_copy": 1,
    "options": "Asset"
   },
   {
@@ -826,7 +825,7 @@
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-02-23 01:05:22.123527",
+ "modified": "2021-06-21 23:03:11.599901",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Sales Invoice Item",
diff --git a/erpnext/accounts/report/tds_computation_summary/tds_computation_summary.py b/erpnext/accounts/report/tds_computation_summary/tds_computation_summary.py
index e15715d..6b9df41 100644
--- a/erpnext/accounts/report/tds_computation_summary/tds_computation_summary.py
+++ b/erpnext/accounts/report/tds_computation_summary/tds_computation_summary.py
@@ -75,7 +75,8 @@
 		select voucher_no, credit
 		from `tabGL Entry`
 		where party in (%s) and credit > 0
-			and company=%s and posting_date between %s and %s
+			and company=%s and is_cancelled = 0
+			and posting_date between %s and %s
 	""", (supplier, company, from_date, to_date), as_dict=1)
 
 	supplier_credit_amount = flt(sum(d.credit for d in entries))
diff --git a/erpnext/accounts/utils.py b/erpnext/accounts/utils.py
index 66a9b60..1cdbd8d 100644
--- a/erpnext/accounts/utils.py
+++ b/erpnext/accounts/utils.py
@@ -472,7 +472,8 @@
 		"total_amount": d.grand_total,
 		"outstanding_amount": d.outstanding_amount,
 		"allocated_amount": d.allocated_amount,
-		"exchange_rate": d.exchange_rate
+		"exchange_rate": d.exchange_rate if not d.exchange_gain_loss else payment_entry.get_exchange_rate(),
+		"exchange_gain_loss": d.exchange_gain_loss # only populated from invoice in case of advance allocation
 	}
 
 	if d.voucher_detail_no:
@@ -498,12 +499,15 @@
 	payment_entry.set_amounts()
 
 	if d.difference_amount and d.difference_account:
-		payment_entry.set_gain_or_loss(account_details={
+		account_details = {
 			'account': d.difference_account,
 			'cost_center': payment_entry.cost_center or frappe.get_cached_value('Company',
-				payment_entry.company, "cost_center"),
-			'amount': d.difference_amount
-		})
+				payment_entry.company, "cost_center")
+		}
+		if d.difference_amount:
+			account_details['amount'] = d.difference_amount
+
+		payment_entry.set_gain_or_loss(account_details=account_details)
 
 	if not do_not_save:
 		payment_entry.save(ignore_permissions=True)
@@ -784,7 +788,7 @@
 	return acc
 
 def create_payment_gateway_account(gateway, payment_channel="Email"):
-	from erpnext.setup.setup_wizard.operations.company_setup import create_bank_account
+	from erpnext.setup.setup_wizard.operations.install_fixtures import create_bank_account
 
 	company = frappe.db.get_value("Global Defaults", None, "default_company")
 	if not company:
diff --git a/erpnext/assets/doctype/asset/depreciation.py b/erpnext/assets/doctype/asset/depreciation.py
index 8f0afb4..8fdbbf9 100644
--- a/erpnext/assets/doctype/asset/depreciation.py
+++ b/erpnext/assets/doctype/asset/depreciation.py
@@ -176,22 +176,34 @@
 
 	asset.set_status()
 
-@frappe.whitelist()
+def get_gl_entries_on_asset_regain(asset, selling_amount=0, finance_book=None):
+	fixed_asset_account, asset, depreciation_cost_center, accumulated_depr_account, accumulated_depr_amount, disposal_account, value_after_depreciation = \
+		get_asset_details(asset, finance_book)
+
+	gl_entries = [
+		{
+			"account": fixed_asset_account,
+			"debit_in_account_currency": asset.gross_purchase_amount,
+			"debit": asset.gross_purchase_amount,
+			"cost_center": depreciation_cost_center
+		},
+		{
+			"account": accumulated_depr_account,
+			"credit_in_account_currency": accumulated_depr_amount,
+			"credit": accumulated_depr_amount,
+			"cost_center": depreciation_cost_center
+		}
+	]
+
+	profit_amount = abs(flt(value_after_depreciation)) - abs(flt(selling_amount))
+	if profit_amount:
+		get_profit_gl_entries(profit_amount, gl_entries, disposal_account, depreciation_cost_center)
+
+	return gl_entries
+
 def get_gl_entries_on_asset_disposal(asset, selling_amount=0, finance_book=None):
-	fixed_asset_account, accumulated_depr_account, depr_expense_account = get_depreciation_accounts(asset)
-	disposal_account, depreciation_cost_center = get_disposal_account_and_cost_center(asset.company)
-	depreciation_cost_center = asset.cost_center or depreciation_cost_center
-
-	idx = 1
-	if finance_book:
-		for d in asset.finance_books:
-			if d.finance_book == finance_book:
-				idx = d.idx
-				break
-
-	value_after_depreciation = (asset.finance_books[idx - 1].value_after_depreciation
-		if asset.calculate_depreciation else asset.value_after_depreciation)
-	accumulated_depr_amount = flt(asset.gross_purchase_amount) - flt(value_after_depreciation)
+	fixed_asset_account, asset, depreciation_cost_center, accumulated_depr_account, accumulated_depr_amount, disposal_account, value_after_depreciation = \
+		get_asset_details(asset, finance_book)
 
 	gl_entries = [
 		{
@@ -210,16 +222,37 @@
 
 	profit_amount = flt(selling_amount) - flt(value_after_depreciation)
 	if profit_amount:
-		debit_or_credit = "debit" if profit_amount < 0 else "credit"
-		gl_entries.append({
-			"account": disposal_account,
-			"cost_center": depreciation_cost_center,
-			debit_or_credit: abs(profit_amount),
-			debit_or_credit + "_in_account_currency": abs(profit_amount)
-		})
+		get_profit_gl_entries(profit_amount, gl_entries, disposal_account, depreciation_cost_center)
 
 	return gl_entries
 
+def get_asset_details(asset, finance_book=None):
+	fixed_asset_account, accumulated_depr_account, depr_expense_account = get_depreciation_accounts(asset)
+	disposal_account, depreciation_cost_center = get_disposal_account_and_cost_center(asset.company)
+	depreciation_cost_center = asset.cost_center or depreciation_cost_center
+
+	idx = 1
+	if finance_book:
+		for d in asset.finance_books:
+			if d.finance_book == finance_book:
+				idx = d.idx
+				break
+
+	value_after_depreciation = (asset.finance_books[idx - 1].value_after_depreciation
+		if asset.calculate_depreciation else asset.value_after_depreciation)
+	accumulated_depr_amount = flt(asset.gross_purchase_amount) - flt(value_after_depreciation)
+
+	return fixed_asset_account, asset, depreciation_cost_center, accumulated_depr_account, accumulated_depr_amount, disposal_account, value_after_depreciation
+
+def get_profit_gl_entries(profit_amount, gl_entries, disposal_account, depreciation_cost_center):
+	debit_or_credit = "debit" if profit_amount < 0 else "credit"
+	gl_entries.append({
+		"account": disposal_account,
+		"cost_center": depreciation_cost_center,
+		debit_or_credit: abs(profit_amount),
+		debit_or_credit + "_in_account_currency": abs(profit_amount)
+	})
+
 @frappe.whitelist()
 def get_disposal_account_and_cost_center(company):
 	disposal_account, depreciation_cost_center = frappe.get_cached_value('Company',  company,
diff --git a/erpnext/buying/doctype/supplier/supplier.js b/erpnext/buying/doctype/supplier/supplier.js
index 4ddc458..1766c2c 100644
--- a/erpnext/buying/doctype/supplier/supplier.js
+++ b/erpnext/buying/doctype/supplier/supplier.js
@@ -60,10 +60,23 @@
 				erpnext.utils.make_pricing_rule(frm.doc.doctype, frm.doc.name);
 			}, __('Create'));
 
+			frm.add_custom_button(__('Get Supplier Group Details'), function () {
+				frm.trigger("get_supplier_group_details");
+			}, __('Actions'));
+
 			// indicators
 			erpnext.utils.set_party_dashboard_indicators(frm);
 		}
 	},
+	get_supplier_group_details: function(frm) {
+		frappe.call({
+			method: "get_supplier_group_details",
+			doc: frm.doc,
+			callback: function() {
+				frm.refresh();
+			}
+		});
+	},
 
 	is_internal_supplier: function(frm) {
 		if (frm.doc.is_internal_supplier == 1) {
diff --git a/erpnext/buying/doctype/supplier/supplier.py b/erpnext/buying/doctype/supplier/supplier.py
index edeb135..fd16b23 100644
--- a/erpnext/buying/doctype/supplier/supplier.py
+++ b/erpnext/buying/doctype/supplier/supplier.py
@@ -51,6 +51,23 @@
 		validate_party_accounts(self)
 		self.validate_internal_supplier()
 
+	@frappe.whitelist()
+	def get_supplier_group_details(self):
+		doc = frappe.get_doc('Supplier Group', self.supplier_group)
+		self.payment_terms = ""
+		self.accounts = []
+
+		if doc.accounts:
+			for account in doc.accounts:
+				child = self.append('accounts')
+				child.company = account.company
+				child.account = account.account
+
+		if doc.payment_terms:
+			self.payment_terms = doc.payment_terms
+
+		self.save()
+
 	def validate_internal_supplier(self):
 		internal_supplier = frappe.db.get_value("Supplier",
 			{"is_internal_supplier": 1, "represents_company": self.represents_company, "name": ("!=", self.name)}, "name")
@@ -86,4 +103,4 @@
 						create_contact(supplier, 'Supplier',
 							doc.name, args.get('supplier_email_' + str(i)))
 				except frappe.NameError:
-					pass
\ No newline at end of file
+					pass
diff --git a/erpnext/buying/doctype/supplier/test_supplier.py b/erpnext/buying/doctype/supplier/test_supplier.py
index f9c8d35..8980466 100644
--- a/erpnext/buying/doctype/supplier/test_supplier.py
+++ b/erpnext/buying/doctype/supplier/test_supplier.py
@@ -13,6 +13,30 @@
 
 
 class TestSupplier(unittest.TestCase):
+    def test_get_supplier_group_details(self):
+        doc = frappe.new_doc("Supplier Group")
+        doc.supplier_group_name = "_Testing Supplier Group"
+        doc.payment_terms = "_Test Payment Term Template 3"
+        doc.accounts = []
+        test_account_details = {
+            "company": "_Test Company",
+            "account": "Creditors - _TC",
+        }
+        doc.append("accounts", test_account_details)
+        doc.save()
+        s_doc = frappe.new_doc("Supplier")
+        s_doc.supplier_name = "Testing Supplier"
+        s_doc.supplier_group = "_Testing Supplier Group"
+        s_doc.payment_terms = ""
+        s_doc.accounts = []
+        s_doc.insert()
+        s_doc.get_supplier_group_details()
+        self.assertEqual(s_doc.payment_terms, "_Test Payment Term Template 3")
+        self.assertEqual(s_doc.accounts[0].company, "_Test Company")
+        self.assertEqual(s_doc.accounts[0].account, "Creditors - _TC")
+        s_doc.delete()
+        doc.delete()
+
     def test_supplier_default_payment_terms(self):
         # Payment Term based on Days after invoice date
         frappe.db.set_value(
@@ -136,4 +160,4 @@
         return doc
 
     except frappe.DuplicateEntryError:
-        return frappe.get_doc("Supplier", args.supplier_name)
\ No newline at end of file
+        return frappe.get_doc("Supplier", args.supplier_name)
diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index 1c086e9..a9860ed 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -124,6 +124,8 @@
 			if cint(self.allocate_advances_automatically) and not cint(self.get(pos_check_field)):
 				self.set_advances()
 
+			self.set_advance_gain_or_loss()
+
 			if self.is_return:
 				self.validate_qty()
 			else:
@@ -584,15 +586,18 @@
 				allocated_amount = min(amount - advance_allocated, d.amount)
 			advance_allocated += flt(allocated_amount)
 
-			self.append("advances", {
+			advance_row = {
 				"doctype": self.doctype + " Advance",
 				"reference_type": d.reference_type,
 				"reference_name": d.reference_name,
 				"reference_row": d.reference_row,
 				"remarks": d.remarks,
 				"advance_amount": flt(d.amount),
-				"allocated_amount": allocated_amount
-			})
+				"allocated_amount": allocated_amount,
+				"ref_exchange_rate": flt(d.exchange_rate) # exchange_rate of advance entry
+			}
+
+			self.append("advances", advance_row)
 
 	def get_advance_entries(self, include_unallocated=True):
 		if self.doctype == "Sales Invoice":
@@ -650,6 +655,66 @@
 						"Payment Entry {0} is linked against Order {1}, check if it should be pulled as advance in this invoice.")
 							.format(d.reference_name, d.against_order))
 
+	def set_advance_gain_or_loss(self):
+		if not self.get("advances"):
+			return
+
+		for d in self.get("advances"):
+			advance_exchange_rate = d.ref_exchange_rate
+			if (d.allocated_amount and self.conversion_rate != 1
+				and self.conversion_rate != advance_exchange_rate):
+
+				base_allocated_amount_in_ref_rate = advance_exchange_rate * d.allocated_amount
+				base_allocated_amount_in_inv_rate = self.conversion_rate * d.allocated_amount
+				difference = base_allocated_amount_in_ref_rate - base_allocated_amount_in_inv_rate
+
+				d.exchange_gain_loss = difference
+
+	def make_exchange_gain_loss_gl_entries(self, gl_entries):
+		if self.get('doctype') in ['Purchase Invoice', 'Sales Invoice']:
+			for d in self.get("advances"):
+				if d.exchange_gain_loss:
+					party = self.supplier if self.get('doctype') == 'Purchase Invoice' else self.customer
+					party_account = self.credit_to if self.get('doctype') == 'Purchase Invoice' else self.debit_to
+					party_type = "Supplier" if self.get('doctype') == 'Purchase Invoice' else "Customer"
+
+					gain_loss_account = frappe.db.get_value('Company', self.company, 'exchange_gain_loss_account')
+					account_currency = get_account_currency(gain_loss_account)
+					if account_currency != self.company_currency:
+						frappe.throw(_("Currency for {0} must be {1}").format(d.account, self.company_currency))
+
+					# for purchase
+					dr_or_cr = 'debit' if d.exchange_gain_loss > 0 else 'credit'
+					# just reverse for sales?
+					dr_or_cr = 'debit' if dr_or_cr == 'credit' else 'credit'
+
+					gl_entries.append(
+						self.get_gl_dict({
+							"account": gain_loss_account,
+							"account_currency": account_currency,
+							"against": party,
+							dr_or_cr + "_in_account_currency": abs(d.exchange_gain_loss),
+							dr_or_cr: abs(d.exchange_gain_loss),
+							"cost_center": self.cost_center,
+							"project": self.project
+						}, item=d)
+					)
+
+					dr_or_cr = 'debit' if dr_or_cr == 'credit' else 'credit'
+
+					gl_entries.append(
+						self.get_gl_dict({
+							"account": party_account,
+							"party_type": party_type,
+							"party": party,
+							"against": gain_loss_account,
+							dr_or_cr + "_in_account_currency": flt(abs(d.exchange_gain_loss) / self.conversion_rate),
+							dr_or_cr: abs(d.exchange_gain_loss),
+							"cost_center": self.cost_center,
+							"project": self.project
+						}, self.party_account_currency, item=self)
+					)
+
 	def update_against_document_in_jv(self):
 		"""
 			Links invoice and advance voucher:
@@ -690,7 +755,9 @@
 						if self.party_account_currency != self.company_currency else 1),
 					'grand_total': (self.base_grand_total
 						if self.party_account_currency == self.company_currency else self.grand_total),
-					'outstanding_amount': self.outstanding_amount
+					'outstanding_amount': self.outstanding_amount,
+					'difference_account': frappe.db.get_value('Company', self.company, 'exchange_gain_loss_account'),
+					'exchange_gain_loss': flt(d.get('exchange_gain_loss'))
 				})
 				lst.append(args)
 
@@ -1289,6 +1356,8 @@
 	party_account_field = "paid_from" if party_type == "Customer" else "paid_to"
 	currency_field = "paid_from_account_currency" if party_type == "Customer" else "paid_to_account_currency"
 	payment_type = "Receive" if party_type == "Customer" else "Pay"
+	exchange_rate_field = "source_exchange_rate" if payment_type == "Receive" else "target_exchange_rate"
+
 	payment_entries_against_order, unallocated_payment_entries = [], []
 	limit_cond = "limit %s" % limit if limit else ""
 
@@ -1305,27 +1374,28 @@
 				"Payment Entry" as reference_type, t1.name as reference_name,
 				t1.remarks, t2.allocated_amount as amount, t2.name as reference_row,
 				t2.reference_name as against_order, t1.posting_date,
-				t1.{0} as currency
+				t1.{0} as currency, t1.{4} as exchange_rate
 			from `tabPayment Entry` t1, `tabPayment Entry Reference` t2
 			where
 				t1.name = t2.parent and t1.{1} = %s and t1.payment_type = %s
 				and t1.party_type = %s and t1.party = %s and t1.docstatus = 1
 				and t2.reference_doctype = %s {2}
 			order by t1.posting_date {3}
-		""".format(currency_field, party_account_field, reference_condition, limit_cond),
+		""".format(currency_field, party_account_field, reference_condition, limit_cond, exchange_rate_field),
 													  [party_account, payment_type, party_type, party,
 													   order_doctype] + order_list, as_dict=1)
 
 	if include_unallocated:
 		unallocated_payment_entries = frappe.db.sql("""
 				select "Payment Entry" as reference_type, name as reference_name,
-				remarks, unallocated_amount as amount
+				remarks, unallocated_amount as amount, {2} as exchange_rate
 				from `tabPayment Entry`
 				where
 					{0} = %s and party_type = %s and party = %s and payment_type = %s
 					and docstatus = 1 and unallocated_amount > 0
 				order by posting_date {1}
-			""".format(party_account_field, limit_cond), (party_account, party_type, party, payment_type), as_dict=1)
+			""".format(party_account_field, limit_cond, exchange_rate_field),
+			(party_account, party_type, party, payment_type), as_dict=1)
 
 	return list(payment_entries_against_order) + list(unallocated_payment_entries)
 
diff --git a/erpnext/erpnext_integrations/doctype/mpesa_settings/test_mpesa_settings.py b/erpnext/erpnext_integrations/doctype/mpesa_settings/test_mpesa_settings.py
index 3c2e59a..b0e662d 100644
--- a/erpnext/erpnext_integrations/doctype/mpesa_settings/test_mpesa_settings.py
+++ b/erpnext/erpnext_integrations/doctype/mpesa_settings/test_mpesa_settings.py
@@ -7,16 +7,21 @@
 import unittest
 from erpnext.erpnext_integrations.doctype.mpesa_settings.mpesa_settings import process_balance_info, verify_transaction
 from erpnext.accounts.doctype.pos_invoice.test_pos_invoice import create_pos_invoice
+from erpnext.erpnext_integrations.utils import create_mode_of_payment
 
 class TestMpesaSettings(unittest.TestCase):
+	def setUp(self):
+		# create payment gateway in setup
+		create_mpesa_settings(payment_gateway_name="_Test")
+		create_mpesa_settings(payment_gateway_name="_Account Balance")
+		create_mpesa_settings(payment_gateway_name="Payment")
+
 	def tearDown(self):
 		frappe.db.sql('delete from `tabMpesa Settings`')
 		frappe.db.sql('delete from `tabIntegration Request` where integration_request_service = "Mpesa"')
 
 	def test_creation_of_payment_gateway(self):
-		create_mpesa_settings(payment_gateway_name="_Test")
-
-		mode_of_payment = frappe.get_doc("Mode of Payment", "Mpesa-_Test")
+		mode_of_payment = create_mode_of_payment('Mpesa-_Test', payment_type="Phone")
 		self.assertTrue(frappe.db.exists("Payment Gateway Account", {'payment_gateway': "Mpesa-_Test"}))
 		self.assertTrue(mode_of_payment.name)
 		self.assertEqual(mode_of_payment.type, "Phone")
@@ -47,7 +52,6 @@
 		integration_request.delete()
 
 	def test_processing_of_callback_payload(self):
-		create_mpesa_settings(payment_gateway_name="Payment")
 		mpesa_account = frappe.db.get_value("Payment Gateway Account", {"payment_gateway": 'Mpesa-Payment'}, "payment_account")
 		frappe.db.set_value("Account", mpesa_account, "account_currency", "KES")
 		frappe.db.set_value("Customer", "_Test Customer", "default_currency", "KES")
@@ -90,7 +94,6 @@
 		pos_invoice.delete()
 
 	def test_processing_of_multiple_callback_payload(self):
-		create_mpesa_settings(payment_gateway_name="Payment")
 		mpesa_account = frappe.db.get_value("Payment Gateway Account", {"payment_gateway": 'Mpesa-Payment'}, "payment_account")
 		frappe.db.set_value("Account", mpesa_account, "account_currency", "KES")
 		frappe.db.set_value("Mpesa Settings", "Payment", "transaction_limit", "500")
@@ -141,7 +144,6 @@
 		pos_invoice.delete()
 
 	def test_processing_of_only_one_succes_callback_payload(self):
-		create_mpesa_settings(payment_gateway_name="Payment")
 		mpesa_account = frappe.db.get_value("Payment Gateway Account", {"payment_gateway": 'Mpesa-Payment'}, "payment_account")
 		frappe.db.set_value("Account", mpesa_account, "account_currency", "KES")
 		frappe.db.set_value("Mpesa Settings", "Payment", "transaction_limit", "500")
@@ -202,6 +204,7 @@
 
 	doc = frappe.get_doc(dict( #nosec
 		doctype="Mpesa Settings",
+		sandbox=1,
 		payment_gateway_name=payment_gateway_name,
 		consumer_key="5sMu9LVI1oS3oBGPJfh3JyvLHwZOdTKn",
 		consumer_secret="VI1oS3oBGPJfh3JyvLHw",
diff --git a/erpnext/erpnext_integrations/utils.py b/erpnext/erpnext_integrations/utils.py
index 3840e78..a5e162f 100644
--- a/erpnext/erpnext_integrations/utils.py
+++ b/erpnext/erpnext_integrations/utils.py
@@ -52,7 +52,8 @@
 			"payment_gateway": gateway
 		}, ['payment_account'])
 
-	if not frappe.db.exists("Mode of Payment", gateway) and payment_gateway_account:
+	mode_of_payment = frappe.db.exists("Mode of Payment", gateway) 
+	if not mode_of_payment and payment_gateway_account:
 		mode_of_payment = frappe.get_doc({
 			"doctype": "Mode of Payment",
 			"mode_of_payment": gateway,
@@ -66,6 +67,10 @@
 		})
 		mode_of_payment.insert(ignore_permissions=True)
 
+		return mode_of_payment
+	elif mode_of_payment:
+		return frappe.get_doc("Mode of Payment", mode_of_payment)
+
 def get_tracking_url(carrier, tracking_number):
 	# Return the formatted Tracking URL.
 	tracking_url = ''
diff --git a/erpnext/hooks.py b/erpnext/hooks.py
index ba10b58..9717bb9 100644
--- a/erpnext/hooks.py
+++ b/erpnext/hooks.py
@@ -245,7 +245,10 @@
 			"erpnext.portal.utils.set_default_role"]
 	},
 	"Communication": {
-		"on_update": "erpnext.support.doctype.service_level_agreement.service_level_agreement.update_hold_time"
+		"on_update": [
+			"erpnext.support.doctype.service_level_agreement.service_level_agreement.update_hold_time",
+			"erpnext.support.doctype.issue.issue.set_first_response_time"
+		]
 	},
 	("Sales Taxes and Charges Template", 'Price List'): {
 		"on_update": "erpnext.shopping_cart.doctype.shopping_cart_settings.shopping_cart_settings.validate_cart_settings"
diff --git a/erpnext/hr/doctype/expense_claim/test_expense_claim.py b/erpnext/hr/doctype/expense_claim/test_expense_claim.py
index 578eccf..96ea686 100644
--- a/erpnext/hr/doctype/expense_claim/test_expense_claim.py
+++ b/erpnext/hr/doctype/expense_claim/test_expense_claim.py
@@ -72,7 +72,8 @@
 	def test_expense_claim_gl_entry(self):
 		payable_account = get_payable_account(company_name)
 		taxes = generate_taxes()
-		expense_claim = make_expense_claim(payable_account, 300, 200, company_name, "Travel Expenses - _TC4", do_not_submit=True, taxes=taxes)
+		expense_claim = make_expense_claim(payable_account, 300, 200, company_name, "Travel Expenses - _TC4", 
+			do_not_submit=True, taxes=taxes)
 		expense_claim.submit()
 
 		gl_entries = frappe.db.sql("""select account, debit, credit
@@ -82,7 +83,7 @@
 		self.assertTrue(gl_entries)
 
 		expected_values = dict((d[0], d) for d in [
-			['CGST - _TC4',18.0, 0.0],
+			['Output Tax CGST - _TC4',18.0, 0.0],
 			[payable_account, 0.0, 218.0],
 			["Travel Expenses - _TC4", 200.0, 0.0]
 		])
@@ -145,7 +146,7 @@
 	parent_account = frappe.db.get_value('Account',
 		{'company': company_name, 'is_group':1, 'account_type': 'Tax'},
 		'name')
-	account = create_account(company=company_name, account_name="CGST", account_type="Tax", parent_account=parent_account)
+	account = create_account(company=company_name, account_name="Output Tax CGST", account_type="Tax", parent_account=parent_account)
 	return {'taxes':[{
 		"account_head": account,
 		"rate": 0,
diff --git a/erpnext/loan_management/doctype/loan/loan.js b/erpnext/loan_management/doctype/loan/loan.js
index 28af3a9..f9c201a 100644
--- a/erpnext/loan_management/doctype/loan/loan.js
+++ b/erpnext/loan_management/doctype/loan/loan.js
@@ -28,7 +28,8 @@
 		frm.set_query("loan_type", function () {
 			return {
 				"filters": {
-					"docstatus": 1
+					"docstatus": 1,
+					"company": frm.doc.company
 				}
 			};
 		});
diff --git a/erpnext/loan_management/doctype/loan_application/loan_application.js b/erpnext/loan_management/doctype/loan_application/loan_application.js
index 1365274..017026c 100644
--- a/erpnext/loan_management/doctype/loan_application/loan_application.js
+++ b/erpnext/loan_management/doctype/loan_application/loan_application.js
@@ -14,11 +14,18 @@
 	refresh: function(frm) {
 		frm.trigger("toggle_fields");
 		frm.trigger("add_toolbar_buttons");
+		frm.set_query("loan_type", () => {
+			return {
+				filters: {
+					company: frm.doc.company
+				}
+			};
+		});
 	},
 	repayment_method: function(frm) {
-		frm.doc.repayment_amount = frm.doc.repayment_periods = ""
-		frm.trigger("toggle_fields")
-		frm.trigger("toggle_required")
+		frm.doc.repayment_amount = frm.doc.repayment_periods = "";
+		frm.trigger("toggle_fields");
+		frm.trigger("toggle_required");
 	},
 	toggle_fields: function(frm) {
 		frm.toggle_enable("repayment_amount", frm.doc.repayment_method=="Repay Fixed Amount per Period")
diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 986b0c5..c93f7a7 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -290,5 +290,6 @@
 erpnext.patches.v13_0.set_training_event_attendance
 erpnext.patches.v13_0.bill_for_rejected_quantity_in_purchase_invoice
 erpnext.patches.v13_0.rename_issue_status_hold_to_on_hold
+erpnext.patches.v13_0.update_response_by_variance
 erpnext.patches.v13_0.bill_for_rejected_quantity_in_purchase_invoice
 erpnext.patches.v13_0.update_job_card_details
diff --git a/erpnext/patches/v13_0/update_response_by_variance.py b/erpnext/patches/v13_0/update_response_by_variance.py
new file mode 100644
index 0000000..ef4d976
--- /dev/null
+++ b/erpnext/patches/v13_0/update_response_by_variance.py
@@ -0,0 +1,31 @@
+# Copyright (c) 2020, Frappe and Contributors
+# License: GNU General Public License v3. See license.txt
+
+from __future__ import unicode_literals
+import frappe
+
+def execute():
+	if frappe.db.exists('DocType', 'Issue') and frappe.db.count('Issue'):
+		invalid_issues = frappe.get_all('Issue', {
+			'first_responded_on': ['is', 'set'],
+			'response_by_variance': ['<', 0]
+		}, ["name", "response_by_variance", "timestampdiff(Second, `first_responded_on`, `response_by`) as variance"])
+
+		# issues which has response_by_variance set as -ve
+		# but diff between first_responded_on & response_by is +ve i.e SLA isn't failed
+		invalid_issues = [d for d in invalid_issues if d.get('variance') > 0]
+
+		for issue in invalid_issues:
+			frappe.db.set_value('Issue', issue.get('name'), 'response_by_variance', issue.get('variance'), update_modified=False)
+
+		invalid_issues = frappe.get_all('Issue', {
+			'resolution_date': ['is', 'set'],
+			'resolution_by_variance': ['<', 0]
+		}, ["name", "resolution_by_variance", "timestampdiff(Second, `resolution_date`, `resolution_by`) as variance"])
+
+		# issues which has resolution_by_variance set as -ve
+		# but diff between resolution_date & resolution_by is +ve i.e SLA isn't failed
+		invalid_issues = [d for d in invalid_issues if d.get('variance') > 0]
+
+		for issue in invalid_issues:
+			frappe.db.set_value('Issue', issue.get('name'), 'resolution_by_variance', issue.get('variance'), update_modified=False)
diff --git a/erpnext/payroll/doctype/salary_slip/salary_slip.py b/erpnext/payroll/doctype/salary_slip/salary_slip.py
index c55bec8..f82b0d5 100644
--- a/erpnext/payroll/doctype/salary_slip/salary_slip.py
+++ b/erpnext/payroll/doctype/salary_slip/salary_slip.py
@@ -1088,6 +1088,7 @@
 				"applicant": self.employee,
 				"docstatus": 1,
 				"repay_from_salary": 1,
+				"company": self.company
 			})
 
 	def make_loan_repayment_entry(self):
diff --git a/erpnext/payroll/doctype/salary_slip/test_salary_slip.py b/erpnext/payroll/doctype/salary_slip/test_salary_slip.py
index ce88cc3..d730fcf 100644
--- a/erpnext/payroll/doctype/salary_slip/test_salary_slip.py
+++ b/erpnext/payroll/doctype/salary_slip/test_salary_slip.py
@@ -481,15 +481,19 @@
 	if not salary_structure:
 		salary_structure = payroll_frequency + " Salary Structure Test for Salary Slip"
 
+	employee = frappe.db.get_value("Employee",
+					{
+						"user_id": user
+					},
+					["name", "company", "employee_name"],
+					as_dict=True)
 
-	employee = frappe.db.get_value("Employee", {"user_id": user})
-	salary_structure_doc = make_salary_structure(salary_structure, payroll_frequency, employee=employee)
+	salary_structure_doc = make_salary_structure(salary_structure, payroll_frequency, employee=employee.name, company=employee.company)
 	salary_slip_name = frappe.db.get_value("Salary Slip", {"employee": frappe.db.get_value("Employee", {"user_id": user})})
 
 	if not salary_slip_name:
-		salary_slip = make_salary_slip(salary_structure_doc.name, employee = employee)
-		salary_slip.employee_name = frappe.get_value("Employee",
-			{"name":frappe.db.get_value("Employee", {"user_id": user})}, "employee_name")
+		salary_slip = make_salary_slip(salary_structure_doc.name, employee = employee.name)
+		salary_slip.employee_name = employee.employee_name
 		salary_slip.payroll_frequency = payroll_frequency
 		salary_slip.posting_date = nowdate()
 		salary_slip.insert()
diff --git a/erpnext/payroll/doctype/salary_structure/test_salary_structure.py b/erpnext/payroll/doctype/salary_structure/test_salary_structure.py
index e7d123c..374dd7e 100644
--- a/erpnext/payroll/doctype/salary_structure/test_salary_structure.py
+++ b/erpnext/payroll/doctype/salary_structure/test_salary_structure.py
@@ -119,26 +119,25 @@
 	if test_tax:
 		frappe.db.sql("""delete from `tabSalary Structure` where name=%s""",(salary_structure))
 
-	if not frappe.db.exists('Salary Structure', salary_structure):
-		details = {
-			"doctype": "Salary Structure",
-			"name": salary_structure,
-			"company": company or erpnext.get_default_company(),
-			"earnings": make_earning_salary_component(setup=True,  test_tax=test_tax, company_list=["_Test Company"]),
-			"deductions": make_deduction_salary_component(setup=True, test_tax=test_tax, company_list=["_Test Company"]),
-			"payroll_frequency": payroll_frequency,
-			"payment_account": get_random("Account", filters={'account_currency': currency}),
-			"currency": currency
-		}
-		if other_details and isinstance(other_details, dict):
-			details.update(other_details)
-		salary_structure_doc = frappe.get_doc(details)
-		salary_structure_doc.insert()
-		if not dont_submit:
-			salary_structure_doc.submit()
+	if frappe.db.exists("Salary Structure", salary_structure):
+		frappe.db.delete("Salary Structure", salary_structure)
 
-	else:
-		salary_structure_doc = frappe.get_doc("Salary Structure", salary_structure)
+	details = {
+		"doctype": "Salary Structure",
+		"name": salary_structure,
+		"company": company or erpnext.get_default_company(),
+		"earnings": make_earning_salary_component(setup=True,  test_tax=test_tax, company_list=["_Test Company"]),
+		"deductions": make_deduction_salary_component(setup=True, test_tax=test_tax, company_list=["_Test Company"]),
+		"payroll_frequency": payroll_frequency,
+		"payment_account": get_random("Account", filters={"account_currency": currency}),
+		"currency": currency
+	}
+	if other_details and isinstance(other_details, dict):
+		details.update(other_details)
+	salary_structure_doc = frappe.get_doc(details)
+	salary_structure_doc.insert()
+	if not dont_submit:
+		salary_structure_doc.submit()
 
 	filters = {'employee':employee, 'docstatus': 1}
 	if not from_date and payroll_period:
diff --git a/erpnext/payroll/report/bank_remittance/bank_remittance.py b/erpnext/payroll/report/bank_remittance/bank_remittance.py
index 500543c..05a5366 100644
--- a/erpnext/payroll/report/bank_remittance/bank_remittance.py
+++ b/erpnext/payroll/report/bank_remittance/bank_remittance.py
@@ -95,6 +95,7 @@
 				"amount": salary.net_pay,
 			}
 			data.append(row)
+
 	return columns, data
 
 def get_bank_accounts():
@@ -116,7 +117,7 @@
 	entries = get_all("Payroll Entry", payroll_filter, ["name", "payment_account"])
 
 	payment_accounts = [d.payment_account for d in entries]
-	set_company_account(payment_accounts, entries)
+	entries = set_company_account(payment_accounts, entries)
 	return entries
 
 def get_salary_slips(payroll_entries):
diff --git a/erpnext/projects/doctype/task/task.py b/erpnext/projects/doctype/task/task.py
index 39a6024..5976e01 100755
--- a/erpnext/projects/doctype/task/task.py
+++ b/erpnext/projects/doctype/task/task.py
@@ -77,9 +77,6 @@
 		if flt(self.progress or 0) > 100:
 			frappe.throw(_("Progress % for a task cannot be more than 100."))
 
-		if flt(self.progress) == 100:
-			self.status = 'Completed'
-
 		if self.status == 'Completed':
 			self.progress = 100
 
diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
index 0471704..181e340 100644
--- a/erpnext/public/js/controllers/taxes_and_totals.js
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -67,6 +67,8 @@
 
 	calculate_discount_amount(){
 		if (frappe.meta.get_docfield(this.frm.doc.doctype, "discount_amount")) {
+			this.calculate_item_values();
+			this.calculate_net_total();
 			this.set_discount_amount();
 			this.apply_discount_amount();
 		}
diff --git a/erpnext/public/js/help_links.js b/erpnext/public/js/help_links.js
index 5c9a453..d0c935f 100644
--- a/erpnext/public/js/help_links.js
+++ b/erpnext/public/js/help_links.js
@@ -54,7 +54,7 @@
 
 frappe.help.help_links["Form/System Settings"] = [
 	{
-		label: "Naming Series",
+		label: "System Settings",
 		url: docsUrl + "user/manual/en/setting-up/settings/system-settings",
 	},
 ];
@@ -206,7 +206,7 @@
 		label: "PayPal Settings",
 		url:
 			docsUrl +
-			"user/manual/en/setting-up/integrations/paypal-integration",
+			"user/manual/en/erpnext_integration/paypal-integration",
 	},
 ];
 
@@ -215,14 +215,14 @@
 		label: "Razorpay Settings",
 		url:
 			docsUrl +
-			"user/manual/en/setting-up/integrations/razorpay-integration",
+			"user/manual/en/erpnext_integration/razorpay-integration",
 	},
 ];
 
 frappe.help.help_links["Form/Dropbox Settings"] = [
 	{
 		label: "Dropbox Settings",
-		url: docsUrl + "user/manual/en/setting-up/integrations/dropbox-backup",
+		url: docsUrl + "user/manual/en/erpnext_integration/dropbox-backup",
 	},
 ];
 
@@ -230,7 +230,7 @@
 	{
 		label: "LDAP Settings",
 		url:
-			docsUrl + "user/manual/en/setting-up/integrations/ldap-integration",
+			docsUrl + "user/manual/en/erpnext_integration/ldap-integration",
 	},
 ];
 
@@ -239,7 +239,7 @@
 		label: "Stripe Settings",
 		url:
 			docsUrl +
-			"user/manual/en/setting-up/integrations/stripe-integration",
+			"user/manual/en/erpnext_integration/stripe-integration",
 	},
 ];
 
diff --git a/erpnext/public/js/setup_wizard.js b/erpnext/public/js/setup_wizard.js
index ef03b01..6f5d67c 100644
--- a/erpnext/public/js/setup_wizard.js
+++ b/erpnext/public/js/setup_wizard.js
@@ -147,7 +147,7 @@
 			}
 
 			// Validate bank name
-			if(me.values.bank_account){
+			if(me.values.bank_account) { 
 				frappe.call({
 					async: false,
 					method: "erpnext.accounts.doctype.account.chart_of_accounts.chart_of_accounts.validate_bank_account",
diff --git a/erpnext/regional/doctype/gst_settings/gst_settings.py b/erpnext/regional/doctype/gst_settings/gst_settings.py
index bc956e9..af3d92e 100644
--- a/erpnext/regional/doctype/gst_settings/gst_settings.py
+++ b/erpnext/regional/doctype/gst_settings/gst_settings.py
@@ -19,6 +19,21 @@
 			from tabAddress where country = "India" and ifnull(gstin, '')!='' ''')
 		self.set_onload('data', data)
 
+	def validate(self):
+		# Validate duplicate accounts
+		self.validate_duplicate_accounts()
+
+	def validate_duplicate_accounts(self):
+		account_list = []
+		for account in self.get('gst_accounts'):
+			for fieldname in ['cgst_account', 'sgst_account', 'igst_account', 'cess_account']:
+				if account.get(fieldname) in account_list:
+					frappe.throw(_("Account {0} appears multiple times").format(
+						frappe.bold(account.get(fieldname))))
+
+				if account.get(fieldname):
+					account_list.append(account.get(fieldname))
+
 @frappe.whitelist()
 def send_reminder():
 	frappe.has_permission('GST Settings', throw=True)
diff --git a/erpnext/regional/doctype/gstr_3b_report/test_gstr_3b_report.py b/erpnext/regional/doctype/gstr_3b_report/test_gstr_3b_report.py
index 3857ce1..065f80d 100644
--- a/erpnext/regional/doctype/gstr_3b_report/test_gstr_3b_report.py
+++ b/erpnext/regional/doctype/gstr_3b_report/test_gstr_3b_report.py
@@ -46,14 +46,14 @@
 		make_sales_invoice()
 		create_purchase_invoices()
 
-		if frappe.db.exists("GSTR 3B Report", "GSTR3B-March-2019-_Test Address-Billing"):
-			report = frappe.get_doc("GSTR 3B Report", "GSTR3B-March-2019-_Test Address-Billing")
+		if frappe.db.exists("GSTR 3B Report", "GSTR3B-March-2019-_Test Address GST-Billing"):
+			report = frappe.get_doc("GSTR 3B Report", "GSTR3B-March-2019-_Test Address GST-Billing")
 			report.save()
 		else:
 			report = frappe.get_doc({
 				"doctype": "GSTR 3B Report",
 				"company": "_Test Company GST",
-				"company_address": "_Test Address-Billing",
+				"company_address": "_Test Address GST-Billing",
 				"year": getdate().year,
 				"month": month_number_mapping.get(getdate().month)
 			}).insert()
@@ -89,7 +89,7 @@
 
 		si.append("taxes", {
 			"charge_type": "On Net Total",
-			"account_head": "IGST - _GST",
+			"account_head": "Output Tax IGST - _GST",
 			"cost_center": "Main - _GST",
 			"description": "IGST @ 18.0",
 			"rate": 18
@@ -117,7 +117,7 @@
 
 	si.append("taxes", {
 			"charge_type": "On Net Total",
-			"account_head": "IGST - _GST",
+			"account_head": "Output Tax IGST - _GST",
 			"cost_center": "Main - _GST",
 			"description": "IGST @ 18.0",
 			"rate": 18
@@ -138,7 +138,7 @@
 
 	si1.append("taxes", {
 			"charge_type": "On Net Total",
-			"account_head": "IGST - _GST",
+			"account_head": "Output Tax IGST - _GST",
 			"cost_center": "Main - _GST",
 			"description": "IGST @ 18.0",
 			"rate": 18
@@ -159,7 +159,7 @@
 
 	si2.append("taxes", {
 			"charge_type": "On Net Total",
-			"account_head": "IGST - _GST",
+			"account_head": "Output Tax IGST - _GST",
 			"cost_center": "Main - _GST",
 			"description": "IGST @ 18.0",
 			"rate": 18
@@ -195,7 +195,7 @@
 
 	pi.append("taxes", {
 			"charge_type": "On Net Total",
-			"account_head": "CGST - _GST",
+			"account_head": "Input Tax CGST - _GST",
 			"cost_center": "Main - _GST",
 			"description": "CGST @ 9.0",
 			"rate": 9
@@ -203,7 +203,7 @@
 
 	pi.append("taxes", {
 			"charge_type": "On Net Total",
-			"account_head": "SGST - _GST",
+			"account_head": "Input Tax SGST - _GST",
 			"cost_center": "Main - _GST",
 			"description": "SGST @ 9.0",
 			"rate": 9
@@ -410,10 +410,10 @@
 	company.country = "India"
 	company.insert()
 
-	if not frappe.db.exists('Address', '_Test Address-Billing'):
+	if not frappe.db.exists('Address', '_Test Address GST-Billing'):
 		address = frappe.get_doc({
+			"address_title": "_Test Address GST",
 			"address_line1": "_Test Address Line 1",
-			"address_title": "_Test Address",
 			"address_type": "Billing",
 			"city": "_Test City",
 			"state": "Test State",
@@ -444,9 +444,9 @@
 	if not gst_account:
 		gst_settings.append("gst_accounts", {
 			"company": "_Test Company GST",
-			"cgst_account": "CGST - _GST",
-			"sgst_account": "SGST - _GST",
-			"igst_account": "IGST - _GST",
+			"cgst_account": "Output Tax CGST - _GST",
+			"sgst_account": "Output Tax SGST - _GST",
+			"igst_account": "Output Tax IGST - _GST"
 		})
 
 		gst_settings.save()
diff --git a/erpnext/regional/india/setup.py b/erpnext/regional/india/setup.py
index 3e0b9b7..5f9d5ed 100644
--- a/erpnext/regional/india/setup.py
+++ b/erpnext/regional/india/setup.py
@@ -25,6 +25,7 @@
 	frappe.enqueue('erpnext.regional.india.setup.add_hsn_sac_codes', now=frappe.flags.in_test)
 	create_gratuity_rule()
 	add_print_formats()
+	update_accounts_settings_for_taxes()
 
 def add_hsn_sac_codes():
 	if frappe.flags.in_test and frappe.flags.created_hsn_codes:
@@ -680,7 +681,7 @@
 
 def make_fixtures(company=None):
 	docs = []
-	company = company.name if company else frappe.db.get_value("Global Defaults", None, "default_company")
+	company = company or frappe.db.get_value("Global Defaults", None, "default_company")
 
 	set_salary_components(docs)
 	set_tds_account(docs, company)
@@ -698,6 +699,53 @@
 	# create records for Tax Withholding Category
 	set_tax_withholding_category(company)
 
+def update_regional_tax_settings(country, company):
+	# Will only add default GST accounts if present
+	input_account_names = ['Input Tax CGST', 'Input Tax SGST', 'Input Tax IGST']
+	output_account_names = ['Output Tax CGST', 'Output Tax SGST', 'Output Tax IGST']
+	rcm_accounts = ['Input Tax CGST RCM', 'Input Tax SGST RCM', 'Input Tax IGST RCM']
+	gst_settings = frappe.get_single('GST Settings')
+	existing_account_list = []
+
+	for account in gst_settings.get('gst_accounts'):
+		for key in ['cgst_account', 'sgst_account', 'igst_account']:
+			existing_account_list.append(account.get(key))
+
+	gst_accounts = frappe._dict(frappe.get_all("Account",
+		{'company': company, 'account_name': ('in', input_account_names +
+			output_account_names + rcm_accounts)}, ['account_name', 'name'], as_list=1))
+
+	add_accounts_in_gst_settings(company,  input_account_names, gst_accounts,
+		existing_account_list, gst_settings)
+	add_accounts_in_gst_settings(company, output_account_names, gst_accounts,
+		existing_account_list, gst_settings)
+	add_accounts_in_gst_settings(company, rcm_accounts, gst_accounts,
+		existing_account_list, gst_settings, is_reverse_charge=1)
+
+	gst_settings.save()
+
+def add_accounts_in_gst_settings(company, account_names, gst_accounts,
+	existing_account_list, gst_settings, is_reverse_charge=0):
+	accounts_not_added = 1
+
+	for account in account_names:
+		# Default Account Added does not exists
+		if not gst_accounts.get(account):
+			accounts_not_added = 0
+
+		# Check if already added in GST Settings
+		if gst_accounts.get(account) in existing_account_list:
+			accounts_not_added = 0
+
+	if accounts_not_added:
+		gst_settings.append('gst_accounts', {
+			'company': company,
+			'cgst_account': gst_accounts.get(account_names[0]),
+			'sgst_account': gst_accounts.get(account_names[1]),
+			'igst_account': gst_accounts.get(account_names[2]),
+			'is_reverse_charge_account': is_reverse_charge
+		})
+
 def set_salary_components(docs):
 	docs.extend([
 		{'doctype': 'Salary Component', 'salary_component': 'Professional Tax',
@@ -731,12 +779,13 @@
 	docs = get_tds_details(accounts, fiscal_year)
 
 	for d in docs:
-		try:
+		if not frappe.db.exists("Tax Withholding Category", d.get("name")):
 			doc = frappe.get_doc(d)
+			doc.flags.ignore_validate = True
 			doc.flags.ignore_permissions = True
 			doc.flags.ignore_mandatory = True
 			doc.insert()
-		except frappe.DuplicateEntryError:
+		else:
 			doc = frappe.get_doc("Tax Withholding Category", d.get("name"))
 
 			if accounts:
@@ -749,11 +798,12 @@
 					doc.append("rates", d.get('rates')[0])
 
 			doc.flags.ignore_permissions = True
+			doc.flags.ignore_validate = True
 			doc.flags.ignore_mandatory = True
+			doc.flags.ignore_links = True
 			doc.save()
 
 def set_tds_account(docs, company):
-	abbr = frappe.get_value("Company", company, "abbr")
 	parent_account = frappe.db.get_value("Account", filters = {"account_name": "Duties and Taxes", "company": company})
 	if parent_account:
 		docs.extend([
@@ -912,7 +962,6 @@
 	]
 
 def create_gratuity_rule():
-
 	# Standard Indain Gratuity Rule
 	if not frappe.db.exists("Gratuity Rule", "Indian Standard Gratuity Rule"):
 		rule = frappe.new_doc("Gratuity Rule")
@@ -930,3 +979,7 @@
 
 		rule.flags.ignore_mandatory = True
 		rule.save()
+
+def update_accounts_settings_for_taxes():
+	if frappe.db.count('Company') == 1:
+		frappe.db.set_value('Accounts Settings', None, "add_taxes_from_item_tax_template", 0)
\ No newline at end of file
diff --git a/erpnext/regional/report/e_invoice_summary/e_invoice_summary.json b/erpnext/regional/report/e_invoice_summary/e_invoice_summary.json
index 4deb073..d0000ad 100644
--- a/erpnext/regional/report/e_invoice_summary/e_invoice_summary.json
+++ b/erpnext/regional/report/e_invoice_summary/e_invoice_summary.json
@@ -11,7 +11,7 @@
  "is_standard": "Yes",
  "json": "{}",
  "letter_head": "Logo",
- "modified": "2021-03-12 12:36:48.689413",
+ "modified": "2021-03-13 12:36:48.689413",
  "modified_by": "Administrator",
  "module": "Regional",
  "name": "E-Invoice Summary",
diff --git a/erpnext/regional/report/gstr_1/gstr_1.py b/erpnext/regional/report/gstr_1/gstr_1.py
index 1096159..cfcb8c3 100644
--- a/erpnext/regional/report/gstr_1/gstr_1.py
+++ b/erpnext/regional/report/gstr_1/gstr_1.py
@@ -584,7 +584,7 @@
 def get_json(filters, report_name, data):
 	filters = json.loads(filters)
 	report_data = json.loads(data)
-	gstin = get_company_gstin_number(filters["company"], filters["company_address"])
+	gstin = get_company_gstin_number(filters.get("company"), filters.get("company_address"))
 
 	fp = "%02d%s" % (getdate(filters["to_date"]).month, getdate(filters["to_date"]).year)
 
diff --git a/erpnext/selling/doctype/customer/customer.js b/erpnext/selling/doctype/customer/customer.js
index 825b170..2849466 100644
--- a/erpnext/selling/doctype/customer/customer.js
+++ b/erpnext/selling/doctype/customer/customer.js
@@ -130,6 +130,10 @@
 				erpnext.utils.make_pricing_rule(frm.doc.doctype, frm.doc.name);
 			}, __('Create'));
 
+			frm.add_custom_button(__('Get Customer Group Details'), function () {
+				frm.trigger("get_customer_group_details");
+			}, __('Actions'));
+
 			// indicator
 			erpnext.utils.set_party_dashboard_indicators(frm);
 
@@ -145,4 +149,15 @@
 		if(frm.doc.lead_name) frappe.model.clear_doc("Lead", frm.doc.lead_name);
 
 	},
-});
\ No newline at end of file
+	get_customer_group_details: function(frm) {
+		frappe.call({
+			method: "get_customer_group_details",
+			doc: frm.doc,
+			callback: function() {
+				frm.refresh();
+			}
+		});
+
+	}
+});
+
diff --git a/erpnext/selling/doctype/customer/customer.py b/erpnext/selling/doctype/customer/customer.py
index 818888c..3b62081 100644
--- a/erpnext/selling/doctype/customer/customer.py
+++ b/erpnext/selling/doctype/customer/customer.py
@@ -78,6 +78,29 @@
 			if sum(member.allocated_percentage or 0 for member in self.sales_team) != 100:
 				frappe.throw(_("Total contribution percentage should be equal to 100"))
 
+	@frappe.whitelist()
+	def get_customer_group_details(self):
+		doc = frappe.get_doc('Customer Group', self.customer_group)
+		self.accounts = self.credit_limits = []
+		self.payment_terms = self.default_price_list = ""
+
+		tables = [["accounts", "account"], ["credit_limits", "credit_limit"]]
+		fields = ["payment_terms", "default_price_list"]
+
+		for row in tables:
+			table, field = row[0], row[1]
+			if not doc.get(table): continue
+
+			for entry in doc.get(table):
+				child = self.append(table)
+				child.update({"company": entry.company, field: entry.get(field)})
+
+		for field in fields:
+			if not doc.get(field): continue
+			self.update({field: doc.get(field)})
+
+		self.save()
+
 	def check_customer_group_change(self):
 		frappe.flags.customer_group_changed = False
 
diff --git a/erpnext/selling/doctype/customer/test_customer.py b/erpnext/selling/doctype/customer/test_customer.py
index 7761aa7..b1a5b52 100644
--- a/erpnext/selling/doctype/customer/test_customer.py
+++ b/erpnext/selling/doctype/customer/test_customer.py
@@ -27,6 +27,42 @@
 	def tearDown(self):
 		set_credit_limit('_Test Customer', '_Test Company', 0)
 
+	def test_get_customer_group_details(self):
+		doc = frappe.new_doc("Customer Group")
+		doc.customer_group_name = "_Testing Customer Group"
+		doc.payment_terms = "_Test Payment Term Template 3"
+		doc.accounts = []
+		doc.default_price_list = "Standard Buying"
+		doc.credit_limits = []
+		test_account_details = {
+			"company": "_Test Company",
+			"account": "Creditors - _TC",
+		}
+		test_credit_limits = {
+			"company": "_Test Company",
+			"credit_limit": 350000
+		}
+		doc.append("accounts", test_account_details)
+		doc.append("credit_limits", test_credit_limits)
+		doc.insert()
+
+		c_doc = frappe.new_doc("Customer")
+		c_doc.customer_name = "Testing Customer"
+		c_doc.customer_group = "_Testing Customer Group"
+		c_doc.payment_terms = c_doc.default_price_list = ""
+		c_doc.accounts = c_doc.credit_limits= []
+		c_doc.insert()
+		c_doc.get_customer_group_details()
+		self.assertEqual(c_doc.payment_terms, "_Test Payment Term Template 3")
+
+		self.assertEqual(c_doc.accounts[0].company, "_Test Company")
+		self.assertEqual(c_doc.accounts[0].account, "Creditors - _TC")
+
+		self.assertEqual(c_doc.credit_limits[0].company, "_Test Company")
+		self.assertEqual(c_doc.credit_limits[0].credit_limit, 350000)
+		c_doc.delete()
+		doc.delete()
+
 	def test_party_details(self):
 		from erpnext.accounts.party import get_party_details
 
diff --git a/erpnext/selling/page/point_of_sale/pos_item_cart.js b/erpnext/selling/page/point_of_sale/pos_item_cart.js
index 38508c2..f7b2c1d 100644
--- a/erpnext/selling/page/point_of_sale/pos_item_cart.js
+++ b/erpnext/selling/page/point_of_sale/pos_item_cart.js
@@ -965,8 +965,23 @@
 		});
 	}
 
+	attach_refresh_field_event(frm) {
+		$(frm.wrapper).off('refresh-fields');
+		$(frm.wrapper).on('refresh-fields', () => {
+			if (frm.doc.items.length) {
+				frm.doc.items.forEach(item => {
+					this.update_item_html(item);
+				});
+			}
+			this.update_totals_section(frm);
+		});
+	}
+
 	load_invoice() {
 		const frm = this.events.get_frm();
+		
+		this.attach_refresh_field_event(frm);
+
 		this.fetch_customer_details(frm.doc.customer).then(() => {
 			this.events.customer_details_updated(this.customer_info);
 			this.update_customer_section();
diff --git a/erpnext/setup/doctype/company/company.py b/erpnext/setup/doctype/company/company.py
index 0427abe..36a7d20 100644
--- a/erpnext/setup/doctype/company/company.py
+++ b/erpnext/setup/doctype/company/company.py
@@ -110,7 +110,7 @@
 				self.create_default_warehouses()
 
 		if frappe.flags.country_change:
-			install_country_fixtures(self.name)
+			install_country_fixtures(self.name, self.country)
 			self.create_default_tax_template()
 
 		if not frappe.db.get_value("Department", {"company": self.name}):
@@ -395,7 +395,7 @@
 
 @frappe.whitelist()
 def enqueue_replace_abbr(company, old, new):
-	kwargs = dict(company=company, old=old, new=new)
+	kwargs = dict(queue="long", company=company, old=old, new=new)
 	frappe.enqueue('erpnext.setup.doctype.company.company.replace_abbr', **kwargs)
 
 
@@ -440,16 +440,15 @@
 
 	return " - ".join(parts)
 
-def install_country_fixtures(company):
-	company_doc = frappe.get_doc("Company", company)
-	path = frappe.get_app_path('erpnext', 'regional', frappe.scrub(company_doc.country))
+def install_country_fixtures(company, country):
+	path = frappe.get_app_path('erpnext', 'regional', frappe.scrub(country))
 	if os.path.exists(path.encode("utf-8")):
 		try:
-			module_name = "erpnext.regional.{0}.setup.setup".format(frappe.scrub(company_doc.country))
-			frappe.get_attr(module_name)(company_doc, False)
+			module_name = "erpnext.regional.{0}.setup.setup".format(frappe.scrub(country))
+			frappe.get_attr(module_name)(company, False)
 		except Exception as e:
 			frappe.log_error()
-			frappe.throw(_("Failed to setup defaults for country {0}. Please contact support@erpnext.com").format(frappe.bold(company_doc.country)))
+			frappe.throw(_("Failed to setup defaults for country {0}. Please contact support@erpnext.com").format(frappe.bold(country)))
 
 
 def update_company_current_month_sales(company):
diff --git a/erpnext/setup/doctype/transaction_deletion_record/transaction_deletion_record.py b/erpnext/setup/doctype/transaction_deletion_record/transaction_deletion_record.py
index ece9fb5..691d331 100644
--- a/erpnext/setup/doctype/transaction_deletion_record/transaction_deletion_record.py
+++ b/erpnext/setup/doctype/transaction_deletion_record/transaction_deletion_record.py
@@ -12,10 +12,14 @@
 class TransactionDeletionRecord(Document):
 	def validate(self):
 		frappe.only_for('System Manager')
+		self.validate_doctypes_to_be_ignored()
+
+	def validate_doctypes_to_be_ignored(self):
 		doctypes_to_be_ignored_list = get_doctypes_to_be_ignored()
 		for doctype in self.doctypes_to_be_ignored:
 			if doctype.doctype_name not in doctypes_to_be_ignored_list:
-				frappe.throw(_("DocTypes should not be added manually to the 'Excluded DocTypes' table. You are only allowed to remove entries from it. "), title=_("Not Allowed"))
+				frappe.throw(_("DocTypes should not be added manually to the 'Excluded DocTypes' table. You are only allowed to remove entries from it. "), 
+					title=_("Not Allowed"))
 
 	def before_submit(self):
 		if not self.doctypes_to_be_ignored:
@@ -23,54 +27,9 @@
 
 		self.delete_bins()
 		self.delete_lead_addresses()
-		
-		company_obj = frappe.get_doc('Company', self.company)
-		# reset company values
-		company_obj.total_monthly_sales = 0
-		company_obj.sales_monthly_history = None
-		company_obj.save()
-		# Clear notification counts
+		self.reset_company_values()
 		clear_notifications()
-
-		singles = frappe.get_all('DocType', filters = {'issingle': 1}, pluck = 'name')
-		tables = frappe.get_all('DocType', filters = {'istable': 1}, pluck = 'name')
-		doctypes_to_be_ignored_list = singles
-		for doctype in self.doctypes_to_be_ignored:
-			doctypes_to_be_ignored_list.append(doctype.doctype_name)
-
-		docfields = frappe.get_all('DocField', 
-			filters = {
-				'fieldtype': 'Link', 
-				'options': 'Company',
-				'parent': ['not in', doctypes_to_be_ignored_list]},
-			fields=['parent', 'fieldname'])
-	
-		for docfield in docfields:
-			if docfield['parent'] != self.doctype:
-				no_of_docs = frappe.db.count(docfield['parent'], {
-							docfield['fieldname'] : self.company
-						})
-
-				if no_of_docs > 0:
-					self.delete_version_log(docfield['parent'], docfield['fieldname'])
-					self.delete_communications(docfield['parent'], docfield['fieldname'])
-
-					# populate DocTypes table
-					if docfield['parent'] not in tables:
-						self.append('doctypes', {
-							'doctype_name' : docfield['parent'],
-							'no_of_docs' : no_of_docs
-						})
-
-					# delete the docs linked with the specified company
-					frappe.db.delete(docfield['parent'], {
-						docfield['fieldname'] : self.company
-					})
-
-					naming_series = frappe.db.get_value('DocType', docfield['parent'], 'autoname')
-					if naming_series:
-						if '#' in naming_series:
-							self.update_naming_series(naming_series, docfield['parent'])	
+		self.delete_company_transactions()
 
 	def populate_doctypes_to_be_ignored_table(self):		
 		doctypes_to_be_ignored_list = get_doctypes_to_be_ignored()
@@ -79,6 +38,111 @@
 						'doctype_name' : doctype
 					})
 
+	def delete_bins(self):
+		frappe.db.sql("""delete from tabBin where warehouse in
+				(select name from tabWarehouse where company=%s)""", self.company)
+
+	def delete_lead_addresses(self):
+		"""Delete addresses to which leads are linked"""
+		leads = frappe.get_all('Lead', filters={'company': self.company})
+		leads = ["'%s'" % row.get("name") for row in leads]
+		addresses = []
+		if leads:
+			addresses = frappe.db.sql_list("""select parent from `tabDynamic Link` where link_name
+				in ({leads})""".format(leads=",".join(leads)))
+
+			if addresses:
+				addresses = ["%s" % frappe.db.escape(addr) for addr in addresses]
+
+				frappe.db.sql("""delete from tabAddress where name in ({addresses}) and
+					name not in (select distinct dl1.parent from `tabDynamic Link` dl1
+					inner join `tabDynamic Link` dl2 on dl1.parent=dl2.parent
+					and dl1.link_doctype<>dl2.link_doctype)""".format(addresses=",".join(addresses)))
+
+				frappe.db.sql("""delete from `tabDynamic Link` where link_doctype='Lead'
+					and parenttype='Address' and link_name in ({leads})""".format(leads=",".join(leads)))
+
+			frappe.db.sql("""update tabCustomer set lead_name=NULL where lead_name in ({leads})""".format(leads=",".join(leads)))
+
+	def reset_company_values(self):
+		company_obj = frappe.get_doc('Company', self.company)
+		company_obj.total_monthly_sales = 0
+		company_obj.sales_monthly_history = None
+		company_obj.save()
+
+	def delete_company_transactions(self):
+		doctypes_to_be_ignored_list = self.get_doctypes_to_be_ignored_list()
+		docfields = self.get_doctypes_with_company_field(doctypes_to_be_ignored_list)
+
+		tables = self.get_all_child_doctypes()	
+		for docfield in docfields:
+			if docfield['parent'] != self.doctype:
+				no_of_docs = self.get_number_of_docs_linked_with_specified_company(docfield['parent'], docfield['fieldname'])
+
+				if no_of_docs > 0:
+					self.delete_version_log(docfield['parent'], docfield['fieldname'])
+					self.delete_communications(docfield['parent'], docfield['fieldname'])
+					self.populate_doctypes_table(tables, docfield['parent'], no_of_docs)
+
+					self.delete_child_tables(docfield['parent'], docfield['fieldname'])
+					self.delete_docs_linked_with_specified_company(docfield['parent'], docfield['fieldname'])
+
+					naming_series = frappe.db.get_value('DocType', docfield['parent'], 'autoname')
+					if naming_series:
+						if '#' in naming_series:
+							self.update_naming_series(naming_series, docfield['parent'])	
+
+	def get_doctypes_to_be_ignored_list(self):
+		singles = frappe.get_all('DocType', filters = {'issingle': 1}, pluck = 'name')
+		doctypes_to_be_ignored_list = singles
+		for doctype in self.doctypes_to_be_ignored:
+			doctypes_to_be_ignored_list.append(doctype.doctype_name)
+
+		return doctypes_to_be_ignored_list
+
+	def get_doctypes_with_company_field(self, doctypes_to_be_ignored_list):
+		docfields = frappe.get_all('DocField', 
+			filters = {
+				'fieldtype': 'Link', 
+				'options': 'Company',
+				'parent': ['not in', doctypes_to_be_ignored_list]},
+			fields=['parent', 'fieldname'])
+
+		return docfields
+
+	def get_all_child_doctypes(self):
+		return frappe.get_all('DocType', filters = {'istable': 1}, pluck = 'name')
+
+	def get_number_of_docs_linked_with_specified_company(self, doctype, company_fieldname):
+		return frappe.db.count(doctype, {company_fieldname : self.company})
+
+	def populate_doctypes_table(self, tables, doctype, no_of_docs):
+		if doctype not in tables:
+			self.append('doctypes', {
+				'doctype_name' : doctype,
+				'no_of_docs' : no_of_docs
+			})		
+
+	def delete_child_tables(self, doctype, company_fieldname):
+		parent_docs_to_be_deleted = frappe.get_all(doctype, {
+			company_fieldname : self.company
+		}, pluck = 'name')
+
+		child_tables = frappe.get_all('DocField', filters = {
+			'fieldtype': 'Table', 
+			'parent': doctype
+		}, pluck = 'options')
+
+		for table in child_tables:
+			frappe.db.delete(table, {
+				'parent': ['in', parent_docs_to_be_deleted]
+			})
+
+	def delete_docs_linked_with_specified_company(self, doctype, company_fieldname):
+		frappe.db.delete(doctype, {
+			company_fieldname : self.company
+		})
+
 	def update_naming_series(self, naming_series, doctype_name):
 		if '.' in naming_series:
 			prefix, hashes = naming_series.rsplit('.', 1)
@@ -107,32 +171,6 @@
 
 		frappe.delete_doc('Communication', communication_names, ignore_permissions=True)
 
-	def delete_bins(self):
-		frappe.db.sql("""delete from tabBin where warehouse in
-				(select name from tabWarehouse where company=%s)""", self.company)
-
-	def delete_lead_addresses(self):
-		"""Delete addresses to which leads are linked"""
-		leads = frappe.get_all('Lead', filters={'company': self.company})
-		leads = ["'%s'" % row.get("name") for row in leads]
-		addresses = []
-		if leads:
-			addresses = frappe.db.sql_list("""select parent from `tabDynamic Link` where link_name
-				in ({leads})""".format(leads=",".join(leads)))
-
-			if addresses:
-				addresses = ["%s" % frappe.db.escape(addr) for addr in addresses]
-
-				frappe.db.sql("""delete from tabAddress where name in ({addresses}) and
-					name not in (select distinct dl1.parent from `tabDynamic Link` dl1
-					inner join `tabDynamic Link` dl2 on dl1.parent=dl2.parent
-					and dl1.link_doctype<>dl2.link_doctype)""".format(addresses=",".join(addresses)))
-
-				frappe.db.sql("""delete from `tabDynamic Link` where link_doctype='Lead'
-					and parenttype='Address' and link_name in ({leads})""".format(leads=",".join(leads)))
-
-			frappe.db.sql("""update tabCustomer set lead_name=NULL where lead_name in ({leads})""".format(leads=",".join(leads)))
-
 @frappe.whitelist()
 def get_doctypes_to_be_ignored():
 	doctypes_to_be_ignored_list = ['Account', 'Cost Center', 'Warehouse', 'Budget',
diff --git a/erpnext/setup/setup_wizard/data/country_wise_tax.json b/erpnext/setup/setup_wizard/data/country_wise_tax.json
index daaa626..34af093 100644
--- a/erpnext/setup/setup_wizard/data/country_wise_tax.json
+++ b/erpnext/setup/setup_wizard/data/country_wise_tax.json
@@ -1164,33 +1164,292 @@
 	},
 
 	"India": {
+		"tax_categories": [
+			{
+				"title": "In-State",
+				"is_inter_state": 0,
+				"gst_state": ""
+			},
+			{
+				"title": "Out-State",
+				"is_inter_state": 1,
+				"gst_state": ""
+			},
+			{
+				"title": "Reverse Charge In-State",
+				"is_inter_state": 0,
+				"gst_state": ""
+			},
+			{
+				"title": "Reverse Charge Out-State",
+				"is_inter_state": 1,
+				"gst_state": ""
+			},
+			{
+				"title": "Registered Composition",
+				"is_inter_state": 0,
+				"gst_state": ""
+			}
+		],
 		"chart_of_accounts": {
 			"*": {
 				"item_tax_templates": [
 					{
-						"title": "In State GST",
+						"title": "GST 9%",
 						"taxes": [
 							{
 								"tax_type": {
-									"account_name": "SGST",
+									"account_name": "Output Tax SGST",
 									"tax_rate": 9.00
 								}
 							},
 							{
 								"tax_type": {
-									"account_name": "CGST",
+									"account_name": "Output Tax CGST",
 									"tax_rate": 9.00
 								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Output Tax IGST",
+									"tax_rate": 18.00
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax SGST",
+									"tax_rate": 9.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax CGST",
+									"tax_rate": 9.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax IGST",
+									"tax_rate": 18.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax SGST RCM",
+									"tax_rate": 9.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax CGST RCM",
+									"tax_rate": 9.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax IGST RCM",
+									"tax_rate": 18.00,
+									"root_type": "Asset"
+								}
 							}
 						]
 					},
 					{
-						"title": "Out of State GST",
+						"title": "GST 5%",
 						"taxes": [
 							{
 								"tax_type": {
-									"account_name": "IGST",
-									"tax_rate": 18.00
+									"account_name": "Output Tax SGST",
+									"tax_rate": 2.5
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Output Tax CGST",
+									"tax_rate": 2.5
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Output Tax IGST",
+									"tax_rate": 5.0
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax SGST",
+									"tax_rate": 2.5,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax CGST",
+									"tax_rate": 2.5,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax IGST",
+									"tax_rate": 5.0,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax SGST RCM",
+									"tax_rate": 2.50,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax CGST RCM",
+									"tax_rate": 2.50,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax IGST RCM",
+									"tax_rate": 5.00,
+									"root_type": "Asset"
+								}
+							}
+						]
+					},
+					{
+						"title": "GST 12%",
+						"taxes": [
+							{
+								"tax_type": {
+									"account_name": "Output Tax SGST",
+									"tax_rate": 6.0
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Output Tax CGST",
+									"tax_rate": 6.0
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Output Tax IGST",
+									"tax_rate": 12.0
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax SGST",
+									"tax_rate": 6.0,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax CGST",
+									"tax_rate": 6.0,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax IGST",
+									"tax_rate": 12.0,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax SGST RCM",
+									"tax_rate": 6.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax CGST RCM",
+									"tax_rate": 6.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax IGST RCM",
+									"tax_rate": 12.00,
+									"root_type": "Asset"
+								}
+							}
+						]
+					},
+					{
+						"title": "GST 28%",
+						"taxes": [
+							{
+								"tax_type": {
+									"account_name": "Output Tax SGST",
+									"tax_rate": 14.0
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Output Tax CGST",
+									"tax_rate": 14.0
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Output Tax IGST",
+									"tax_rate": 28.0
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax SGST",
+									"tax_rate": 14.0,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax CGST",
+									"tax_rate": 14.0,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax IGST",
+									"tax_rate": 28.0,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax SGST RCM",
+									"tax_rate": 14.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax CGST RCM",
+									"tax_rate": 14.00,
+									"root_type": "Asset"
+								}
+							},
+							{
+								"tax_type": {
+									"account_name": "Input Tax IGST RCM",
+									"tax_rate": 28.00,
+									"root_type": "Asset"
 								}
 							}
 						]
@@ -1229,36 +1488,117 @@
 						]
 					}
 				],
-				"*": [
+				"sales_tax_templates": [
 					{
-						"title": "In State GST",
+						"title": "Output GST In-state",
 						"taxes": [
 							{
 								"account_head": {
-									"account_name": "SGST",
-									"tax_rate": 9.00
+									"account_name": "Output Tax SGST",
+									"tax_rate": 9.00,
+									"account_type": "Tax"
 								}
 							},
 							{
 								"account_head": {
-									"account_name": "CGST",
-									"tax_rate": 9.00
+									"account_name": "Output Tax CGST",
+									"tax_rate": 9.00,
+									"account_type": "Tax"
 								}
 							}
-						]
+						],
+						"tax_category": "In-State"
 					},
 					{
-						"title": "Out of State GST",
+						"title": "Output GST Out-state",
 						"taxes": [
 							{
 								"account_head": {
-									"account_name": "IGST",
-									"tax_rate": 18.00
+									"account_name": "Output Tax IGST",
+									"tax_rate": 18.00,
+									"account_type": "Tax"
 								}
 							}
-						]
+						],
+						"tax_category": "Out-State"
+					}
+				],
+				"purchase_tax_templates": [
+					{
+						"title": "Input GST In-state",
+						"taxes": [
+							{
+								"account_head": {
+									"account_name": "Input Tax SGST",
+									"tax_rate": 9.00,
+									"root_type": "Asset",
+									"account_type": "Tax"
+								}
+							},
+							{
+								"account_head": {
+									"account_name": "Input Tax CGST",
+									"tax_rate": 9.00,
+									"root_type": "Asset",
+									"account_type": "Tax"
+								}
+							}
+						],
+						"tax_category": "In-State"
 					},
 					{
+						"title": "Input GST Out-state",
+						"taxes": [
+							{
+								"account_head": {
+									"account_name": "Input Tax IGST",
+									"tax_rate": 18.00,
+									"root_type": "Asset",
+									"account_type": "Tax"
+								}
+							}
+						],
+						"tax_category": "Out-State"
+					},
+					{
+						"title": "Input GST RCM In-state",
+						"taxes": [
+							{
+								"account_head": {
+									"account_name": "Input Tax SGST RCM",
+									"tax_rate": 9.00,
+									"root_type": "Asset",
+									"account_type": "Tax"
+								}
+							},
+							{
+								"account_head": {
+									"account_name": "Input Tax CGST RCM",
+									"tax_rate": 9.00,
+									"root_type": "Asset",
+									"account_type": "Tax"
+								}
+							}
+						],
+						"tax_category": "Reverse Charge In-State"
+					},
+					{
+						"title": "Input GST RCM Out-state",
+						"taxes": [
+							{
+								"account_head": {
+									"account_name": "Input Tax IGST RCM",
+									"tax_rate": 18.00,
+									"root_type": "Asset",
+									"account_type": "Tax"
+								}
+							}
+						],
+						"tax_category": "Reverse Charge Out-State"
+					}
+				],
+				"*": [
+					{
 						"title": "VAT 5%",
 						"taxes": [
 							{
@@ -1349,7 +1689,7 @@
 		"Italy VAT 4%":{
 			"account_name": "IVA 4%",
 			"tax_rate": 4.00
-		}		
+		}
 	},
 
 	"Ivory Coast": {
diff --git a/erpnext/setup/setup_wizard/operations/company_setup.py b/erpnext/setup/setup_wizard/operations/company_setup.py
index 3f0bb14..4edf948 100644
--- a/erpnext/setup/setup_wizard/operations/company_setup.py
+++ b/erpnext/setup/setup_wizard/operations/company_setup.py
@@ -42,29 +42,6 @@
 		'quotation_series': "QTN-",
 	}).insert()
 
-def create_bank_account(args):
-	if args.get("bank_account"):
-		company_name = args.get('company_name')
-		bank_account_group =  frappe.db.get_value("Account",
-			{"account_type": "Bank", "is_group": 1, "root_type": "Asset",
-				"company": company_name})
-		if bank_account_group:
-			bank_account = frappe.get_doc({
-				"doctype": "Account",
-				'account_name': args.get("bank_account"),
-				'parent_account': bank_account_group,
-				'is_group':0,
-				'company': company_name,
-				"account_type": "Bank",
-			})
-			try:
-				return bank_account.insert()
-			except RootNotEditable:
-				frappe.throw(_("Bank account cannot be named as {0}").format(args.get("bank_account")))
-			except frappe.DuplicateEntryError:
-				# bank account same as a CoA entry
-				pass
-
 def create_email_digest():
 	from frappe.utils.user import get_system_managers
 	system_managers = get_system_managers(only_name=True)
diff --git a/erpnext/setup/setup_wizard/operations/install_fixtures.py b/erpnext/setup/setup_wizard/operations/install_fixtures.py
index 7ae81d7..cd49a18 100644
--- a/erpnext/setup/setup_wizard/operations/install_fixtures.py
+++ b/erpnext/setup/setup_wizard/operations/install_fixtures.py
@@ -448,6 +448,8 @@
 	set_active_domains(args)
 	update_stock_settings()
 	update_shopping_cart_settings(args)
+
+	args.update({"set_default": 1})
 	create_bank_account(args)
 
 def set_global_defaults(args):
@@ -479,17 +481,17 @@
 	stock_settings.save()
 
 def create_bank_account(args):
-	if not args.bank_account:
+	if not args.get('bank_account'):
 		return
 
-	company_name = args.company_name
+	company_name = args.get('company_name')
 	bank_account_group =  frappe.db.get_value("Account",
 		{"account_type": "Bank", "is_group": 1, "root_type": "Asset",
 			"company": company_name})
 	if bank_account_group:
 		bank_account = frappe.get_doc({
 			"doctype": "Account",
-			'account_name': args.bank_account,
+			'account_name': args.get('bank_account'),
 			'parent_account': bank_account_group,
 			'is_group':0,
 			'company': company_name,
@@ -498,10 +500,13 @@
 		try:
 			doc = bank_account.insert()
 
-			frappe.db.set_value("Company", args.company_name, "default_bank_account", bank_account.name, update_modified=False)
+			if args.get('set_default'):
+				frappe.db.set_value("Company", args.get('company_name'), "default_bank_account", bank_account.name, update_modified=False)
+
+			return doc
 
 		except RootNotEditable:
-			frappe.throw(_("Bank account cannot be named as {0}").format(args.bank_account))
+			frappe.throw(_("Bank account cannot be named as {0}").format(args.get('bank_account')))
 		except frappe.DuplicateEntryError:
 			# bank account same as a CoA entry
 			pass
diff --git a/erpnext/setup/setup_wizard/operations/taxes_setup.py b/erpnext/setup/setup_wizard/operations/taxes_setup.py
index f4fe18e..6ea0ca4 100644
--- a/erpnext/setup/setup_wizard/operations/taxes_setup.py
+++ b/erpnext/setup/setup_wizard/operations/taxes_setup.py
@@ -26,7 +26,8 @@
 	if 'chart_of_accounts' not in country_wise_tax:
 		country_wise_tax = simple_to_detailed(country_wise_tax)
 
-	from_detailed_data(company_name, country_wise_tax)
+	from_detailed_data(company_name, country_wise_tax.get('chart_of_accounts'))
+	update_regional_tax_settings(country, company_name)
 
 
 def simple_to_detailed(templates):
@@ -77,16 +78,15 @@
 def from_detailed_data(company_name, data):
 	"""Create Taxes and Charges Templates from detailed data."""
 	coa_name = frappe.db.get_value('Company', company_name, 'chart_of_accounts')
-	coa_data = data.get('chart_of_accounts', {})
-	tax_templates = coa_data.get(coa_name) or coa_data.get('*', {})
-	tax_categories = data.get('tax_categories')
-	sales_tax_templates = tax_templates.get('sales_tax_templates') or tax_templates.get('*', {})
-	purchase_tax_templates = tax_templates.get('purchase_tax_templates') or tax_templates.get('*', {})
-	item_tax_templates = tax_templates.get('item_tax_templates') or tax_templates.get('*', {})
+	tax_templates = data.get(coa_name) or data.get('*')
+	sales_tax_templates = tax_templates.get('sales_tax_templates') or tax_templates.get('*')
+	purchase_tax_templates = tax_templates.get('purchase_tax_templates') or tax_templates.get('*')
+	item_tax_templates = tax_templates.get('item_tax_templates') or tax_templates.get('*')
+	tax_categories = tax_templates.get('tax_categories')
 
 	if tax_categories:
 		for tax_category in tax_categories:
-			make_tax_catgory(tax_category)
+			make_tax_category(tax_category)
 
 	if sales_tax_templates:
 		for template in sales_tax_templates:
@@ -101,6 +101,17 @@
 			make_item_tax_template(company_name, template)
 
 
+def update_regional_tax_settings(country, company):
+	path = frappe.get_app_path('erpnext', 'regional', frappe.scrub(country))
+	if os.path.exists(path.encode("utf-8")):
+		try:
+			module_name = "erpnext.regional.{0}.setup.update_regional_tax_settings".format(frappe.scrub(country))
+			frappe.get_attr(module_name)(country, company)
+		except Exception as e:
+			# Log error and ignore if failed to setup regional tax settings
+			frappe.log_error()
+			pass
+
 def make_taxes_and_charges_template(company_name, doctype, template):
 	template['company'] = company_name
 	template['doctype'] = doctype
@@ -130,8 +141,14 @@
 			if fieldname not in tax_row:
 				tax_row[fieldname] = default_value
 
-	return frappe.get_doc(template).insert(ignore_permissions=True)
+	doc = frappe.get_doc(template)
 
+	# Data in country wise json is already pre validated, hence validations can be ignored 
+	# Ingone validations to make doctypes faster
+	doc.flags.ignore_links = True
+	doc.flags.ignore_validate = True
+	doc.insert(ignore_permissions=True)
+	return doc
 
 def make_item_tax_template(company_name, template):
 	"""Create an Item Tax Template.
@@ -156,8 +173,24 @@
 			if 'tax_rate' not in tax_row:
 				tax_row['tax_rate'] = account_data.get('tax_rate')
 
-	return frappe.get_doc(template).insert(ignore_permissions=True)
+	doc = frappe.get_doc(template)
 
+	# Data in country wise json is already pre validated, hence validations can be ignored 
+	# Ingone validations to make doctypes faster
+	doc.flags.ignore_links = True
+	doc.flags.ignore_validate = True
+	doc.insert(ignore_permissions=True)
+	return doc
+
+def make_tax_category(tax_category):
+	""" Make tax category based on title if not already created """
+	doctype = 'Tax Category'
+	if not frappe.db.exists(doctype, tax_category['title']):
+		tax_category['doctype'] = doctype
+		doc = frappe.get_doc(tax_category)
+		doc.flags.ignore_links = True
+		doc.flags.ignore_validate = True
+		doc.insert(ignore_permissions=True)
 
 def get_or_create_account(company_name, account):
 	"""
@@ -175,8 +208,7 @@
 		or_filters={
 			'account_name': account.get('account_name'),
 			'account_number': account.get('account_number')
-		}
-	)
+		})
 
 	if existing_accounts:
 		return frappe.get_doc('Account', existing_accounts[0].name)
@@ -191,8 +223,11 @@
 	account['root_type'] = root_type
 	account['is_group'] = 0
 
-	return frappe.get_doc(account).insert(ignore_permissions=True, ignore_mandatory=True)
-
+	doc = frappe.get_doc(account)
+	doc.flags.ignore_links = True
+	doc.flags.ignore_validate = True
+	doc.insert(ignore_permissions=True, ignore_mandatory=True)
+	return doc
 
 def get_or_create_tax_group(company_name, root_type):
 	# Look for a group account of type 'Tax'
@@ -237,7 +272,11 @@
 		'account_type': 'Tax',
 		'account_name': account_name,
 		'parent_account': root_account.name
-	}).insert(ignore_permissions=True)
+	})
+
+	tax_group_account.flags.ignore_links = True
+	tax_group_account.flags.ignore_validate = True
+	tax_group_account.insert(ignore_permissions=True)
 
 	tax_group_name = tax_group_account.name
 
diff --git a/erpnext/stock/doctype/item/test_item.py b/erpnext/stock/doctype/item/test_item.py
index c7467a5..922049f 100644
--- a/erpnext/stock/doctype/item/test_item.py
+++ b/erpnext/stock/doctype/item/test_item.py
@@ -587,8 +587,8 @@
 test_records = frappe.get_test_records('Item')
 
 def create_item(item_code, is_stock_item=1, valuation_rate=0, warehouse="_Test Warehouse - _TC",
-		is_customer_provided_item=None, customer=None, is_purchase_item=None, opening_stock=0,
-		company="_Test Company"):
+		is_customer_provided_item=None, customer=None, is_purchase_item=None, opening_stock=0, is_fixed_asset=0,
+		asset_category=None, company="_Test Company"):
 	if not frappe.db.exists("Item", item_code):
 		item = frappe.new_doc("Item")
 		item.item_code = item_code
@@ -596,6 +596,8 @@
 		item.description = item_code
 		item.item_group = "All Item Groups"
 		item.is_stock_item = is_stock_item
+		item.is_fixed_asset = is_fixed_asset
+		item.asset_category = asset_category
 		item.opening_stock = opening_stock
 		item.valuation_rate = valuation_rate
 		item.is_purchase_item = is_purchase_item
diff --git a/erpnext/stock/doctype/putaway_rule/putaway_rule.py b/erpnext/stock/doctype/putaway_rule/putaway_rule.py
index ea26cac..0f50bcd 100644
--- a/erpnext/stock/doctype/putaway_rule/putaway_rule.py
+++ b/erpnext/stock/doctype/putaway_rule/putaway_rule.py
@@ -97,7 +97,7 @@
 		at_capacity, rules = get_ordered_putaway_rules(item_code, company, source_warehouse=source_warehouse)
 
 		if not rules:
-			warehouse = source_warehouse or item.warehouse
+			warehouse = source_warehouse or item.get('warehouse')
 			if at_capacity:
 				# rules available, but no free space
 				items_not_accomodated.append([item_code, pending_qty])
diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index 8f27ef4..90b81dd 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -529,7 +529,7 @@
 		scrap_items_cost = sum([flt(d.basic_amount) for d in self.get("items") if d.is_scrap_item])
 
 		# Get raw materials cost from BOM if multiple material consumption entries
-		if frappe.db.get_single_value("Manufacturing Settings", "material_consumption"):
+		if frappe.db.get_single_value("Manufacturing Settings", "material_consumption", cache=True):
 			bom_items = self.get_bom_raw_materials(finished_item_qty)
 			outgoing_items_cost = sum([flt(row.qty)*flt(row.rate) for row in bom_items.values()])
 
diff --git a/erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py b/erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py
index 0febcb6..93482e8 100644
--- a/erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py
+++ b/erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py
@@ -89,17 +89,16 @@
 		if item_det.is_stock_item != 1:
 			frappe.throw(_("Item {0} must be a stock Item").format(self.item_code))
 
-		# check if batch number is required
-		if self.voucher_type != 'Stock Reconciliation':
-			if item_det.has_batch_no == 1:
-				batch_item = self.item_code if self.item_code == item_det.item_name else self.item_code + ":" +  item_det.item_name
-				if not self.batch_no:
-					frappe.throw(_("Batch number is mandatory for Item {0}").format(batch_item))
-				elif not frappe.db.get_value("Batch",{"item": self.item_code, "name": self.batch_no}):
-					frappe.throw(_("{0} is not a valid Batch Number for Item {1}").format(self.batch_no, batch_item))
+		# check if batch number is valid
+		if item_det.has_batch_no == 1:
+			batch_item = self.item_code if self.item_code == item_det.item_name else self.item_code + ":" + item_det.item_name
+			if not self.batch_no:
+				frappe.throw(_("Batch number is mandatory for Item {0}").format(batch_item))
+			elif not frappe.db.get_value("Batch",{"item": self.item_code, "name": self.batch_no}):
+				frappe.throw(_("{0} is not a valid Batch Number for Item {1}").format(self.batch_no, batch_item))
 
-			elif item_det.has_batch_no == 0 and self.batch_no and self.is_cancelled == 0:
-				frappe.throw(_("The Item {0} cannot have Batch").format(self.item_code))
+		elif item_det.has_batch_no == 0 and self.batch_no and self.is_cancelled == 0:
+			frappe.throw(_("The Item {0} cannot have Batch").format(self.item_code))
 
 		if item_det.has_variants:
 			frappe.throw(_("Stock cannot exist for Item {0} since has variants").format(self.item_code),
@@ -178,3 +177,4 @@
 
 	frappe.db.add_index("Stock Ledger Entry", ["voucher_no", "voucher_type"])
 	frappe.db.add_index("Stock Ledger Entry", ["batch_no", "item_code", "warehouse"])
+	frappe.db.add_index("Stock Ledger Entry", ["voucher_detail_no"])
diff --git a/erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.js b/erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.js
index 76a3f1a..4540954 100644
--- a/erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.js
+++ b/erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.js
@@ -17,6 +17,14 @@
 				}
 			}
 		});
+		frm.set_query("batch_no", "items", function(doc, cdt, cdn) {
+			var item = locals[cdt][cdn];
+			return {
+				filters: {
+					'item': item.item_code
+				}
+			};
+		});
 
 		if (frm.doc.company) {
 			erpnext.queries.setup_queries(frm, "Warehouse", function() {
diff --git a/erpnext/stock/doctype/stock_reconciliation/test_stock_reconciliation.py b/erpnext/stock/doctype/stock_reconciliation/test_stock_reconciliation.py
index 7b98c7b..cbe413b 100644
--- a/erpnext/stock/doctype/stock_reconciliation/test_stock_reconciliation.py
+++ b/erpnext/stock/doctype/stock_reconciliation/test_stock_reconciliation.py
@@ -16,6 +16,7 @@
 from erpnext.stock.doctype.serial_no.serial_no import get_serial_nos
 from erpnext.stock.doctype.purchase_receipt.test_purchase_receipt import make_purchase_receipt
 
+
 class TestStockReconciliation(unittest.TestCase):
 	@classmethod
 	def setUpClass(self):
@@ -316,6 +317,26 @@
 		dn2.cancel()
 		pr1.cancel()
 
+	def test_valid_batch(self):
+		create_batch_item_with_batch("Testing Batch Item 1", "001")
+		create_batch_item_with_batch("Testing Batch Item 2", "002")
+		sr = create_stock_reconciliation(item_code="Testing Batch Item 1", qty=1, rate=100, batch_no="002"
+			, do_not_submit=True)
+		self.assertRaises(frappe.ValidationError, sr.submit)
+
+def create_batch_item_with_batch(item_name, batch_id):
+	batch_item_doc = create_item(item_name, is_stock_item=1)
+	if not batch_item_doc.has_batch_no:
+		batch_item_doc.has_batch_no = 1
+		batch_item_doc.create_new_batch = 1
+		batch_item_doc.save(ignore_permissions=True)
+
+	if not frappe.db.exists('Batch', batch_id):
+		b = frappe.new_doc('Batch')
+		b.item = item_name
+		b.batch_id = batch_id
+		b.save()
+
 def insert_existing_sle(warehouse):
 	from erpnext.stock.doctype.stock_entry.test_stock_entry import make_stock_entry
 
diff --git a/erpnext/stock/stock_ledger.py b/erpnext/stock/stock_ledger.py
index 4e9c768..c15d1ed 100644
--- a/erpnext/stock/stock_ledger.py
+++ b/erpnext/stock/stock_ledger.py
@@ -6,13 +6,14 @@
 import erpnext
 import copy
 from frappe import _
-from frappe.utils import cint, flt, cstr, now, get_link_to_form
+from frappe.utils import cint, flt, cstr, now, get_link_to_form, getdate
 from frappe.model.meta import get_field_precision
 from erpnext.stock.utils import get_valuation_method, get_incoming_outgoing_rate_for_cancel
 from erpnext.stock.utils import get_bin
 import json
 from six import iteritems
 
+
 # future reposting
 class NegativeStockError(frappe.ValidationError): pass
 class SerialNoExistsInFutureTransaction(frappe.ValidationError):
@@ -130,7 +131,13 @@
 	if not args and voucher_type and voucher_no:
 		args = get_args_for_voucher(voucher_type, voucher_no)
 
-	distinct_item_warehouses = [(d.item_code, d.warehouse) for d in args]
+	distinct_item_warehouses = {}
+	for i, d in enumerate(args):
+		distinct_item_warehouses.setdefault((d.item_code, d.warehouse), frappe._dict({
+			"reposting_status": False,
+			"sle": d,
+			"args_idx": i
+		}))
 
 	i = 0
 	while i < len(args):
@@ -139,13 +146,21 @@
 			"warehouse": args[i].warehouse,
 			"posting_date": args[i].posting_date,
 			"posting_time": args[i].posting_time,
-			"creation": args[i].get("creation")
+			"creation": args[i].get("creation"),
+			"distinct_item_warehouses": distinct_item_warehouses
 		}, allow_negative_stock=allow_negative_stock, via_landed_cost_voucher=via_landed_cost_voucher)
 
-		for item_wh, new_sle in iteritems(obj.new_items):
-			if item_wh not in distinct_item_warehouses:
-				args.append(new_sle)
+		distinct_item_warehouses[(args[i].item_code, args[i].warehouse)].reposting_status = True
 
+		if obj.new_items_found:
+			for item_wh, data in iteritems(distinct_item_warehouses):
+				if ('args_idx' not in data and not data.reposting_status) or (data.sle_changed and data.reposting_status):
+					data.args_idx = len(args)
+					args.append(data.sle)
+				elif data.sle_changed and not data.reposting_status:
+					args[data.args_idx] = data.sle
+				
+				data.sle_changed = False
 		i += 1
 
 def get_args_for_voucher(voucher_type, voucher_no):
@@ -186,11 +201,12 @@
 		self.company = frappe.get_cached_value("Warehouse", self.args.warehouse, "company")
 		self.get_precision()
 		self.valuation_method = get_valuation_method(self.item_code)
-		self.new_items = {}
+
+		self.new_items_found = False
+		self.distinct_item_warehouses = args.get("distinct_item_warehouses", frappe._dict())
 
 		self.data = frappe._dict()
 		self.initialize_previous_data(self.args)
-
 		self.build()
 
 	def get_precision(self):
@@ -296,11 +312,29 @@
 		elif dependant_sle.item_code == self.item_code and dependant_sle.warehouse == self.args.warehouse:
 			return entries_to_fix
 		elif dependant_sle.item_code != self.item_code:
-			if (dependant_sle.item_code, dependant_sle.warehouse) not in self.new_items:
-				self.new_items[(dependant_sle.item_code, dependant_sle.warehouse)] = dependant_sle
+			self.update_distinct_item_warehouses(dependant_sle)
 			return entries_to_fix
 		elif dependant_sle.item_code == self.item_code and dependant_sle.warehouse in self.data:
 			return entries_to_fix
+		else:
+			return self.append_future_sle_for_dependant(dependant_sle, entries_to_fix)
+
+	def update_distinct_item_warehouses(self, dependant_sle):
+		key = (dependant_sle.item_code, dependant_sle.warehouse)
+		val = frappe._dict({
+			"sle": dependant_sle
+		})
+		if key not in self.distinct_item_warehouses:
+			self.distinct_item_warehouses[key] = val
+			self.new_items_found = True
+		else:
+			existing_sle_posting_date = self.distinct_item_warehouses[key].get("sle", {}).get("posting_date")
+			if getdate(dependant_sle.posting_date) < getdate(existing_sle_posting_date):
+				val.sle_changed = True
+				self.distinct_item_warehouses[key] = val
+				self.new_items_found = True
+
+	def append_future_sle_for_dependant(self, dependant_sle, entries_to_fix):
 		self.initialize_previous_data(dependant_sle)
 
 		args = self.data[dependant_sle.warehouse].previous_sle \
@@ -393,6 +427,7 @@
 		rate = 0
 		# Material Transfer, Repack, Manufacturing
 		if sle.voucher_type == "Stock Entry":
+			self.recalculate_amounts_in_stock_entry(sle.voucher_no)
 			rate = frappe.db.get_value("Stock Entry Detail", sle.voucher_detail_no, "valuation_rate")
 		# Sales and Purchase Return
 		elif sle.voucher_type in ("Purchase Receipt", "Purchase Invoice", "Delivery Note", "Sales Invoice"):
@@ -442,7 +477,11 @@
 		frappe.db.set_value("Stock Entry Detail", sle.voucher_detail_no, "basic_rate", outgoing_rate)
 
 		# Update outgoing item's rate, recalculate FG Item's rate and total incoming/outgoing amount
-		stock_entry = frappe.get_doc("Stock Entry", sle.voucher_no, for_update=True)
+		if not sle.dependant_sle_voucher_detail_no:
+			self.recalculate_amounts_in_stock_entry(sle.voucher_no)
+
+	def recalculate_amounts_in_stock_entry(self, voucher_no):
+		stock_entry = frappe.get_doc("Stock Entry", voucher_no, for_update=True)
 		stock_entry.calculate_rate_and_amount(reset_outgoing_rate=False, raise_error_if_no_rate=False)
 		stock_entry.db_update()
 		for d in stock_entry.items:
diff --git a/erpnext/support/doctype/issue/issue.py b/erpnext/support/doctype/issue/issue.py
index dd6d647..b9a65b6 100644
--- a/erpnext/support/doctype/issue/issue.py
+++ b/erpnext/support/doctype/issue/issue.py
@@ -5,10 +5,10 @@
 import frappe
 import json
 from frappe import _
-from frappe import utils
 from frappe.model.document import Document
-from frappe.utils import now_datetime
-from datetime import datetime, timedelta
+from frappe.utils import now_datetime, time_diff_in_seconds, get_datetime, date_diff
+from frappe.core.utils import get_parent_doc
+from datetime import timedelta
 from frappe.model.mapper import get_mapped_doc
 from frappe.utils.user import is_website_user
 from frappe.email.inbox import link_communication_to_document
@@ -212,7 +212,129 @@
 
 	return issue.name
 
+def get_time_in_timedelta(time):
+	"""
+		Converts datetime.time(10, 36, 55, 961454) to datetime.timedelta(seconds=38215)
+	"""
+	return timedelta(hours=time.hour, minutes=time.minute, seconds=time.second)
+
+def set_first_response_time(communication, method):
+	if communication.get('reference_doctype') == "Issue":
+		issue = get_parent_doc(communication)
+		if is_first_response(issue):
+			first_response_time = calculate_first_response_time(issue, get_datetime(issue.first_responded_on))
+			issue.db_set("first_response_time", first_response_time)
+
+def is_first_response(issue):
+	responses = frappe.get_all('Communication', filters = {'reference_name': issue.name, 'sent_or_received': 'Sent'})
+	if len(responses) == 1: 
+		return True
+	return False
+
+def calculate_first_response_time(issue, first_responded_on):
+	issue_creation_date = issue.creation
+	issue_creation_time = get_time_in_seconds(issue_creation_date)
+	first_responded_on_in_seconds = get_time_in_seconds(first_responded_on)
+	support_hours = frappe.get_cached_doc("Service Level Agreement", issue.service_level_agreement).support_and_resolution
+
+	if issue_creation_date.day == first_responded_on.day:
+		if is_work_day(issue_creation_date, support_hours):
+			start_time, end_time = get_working_hours(issue_creation_date, support_hours)
+
+			# issue creation and response on the same day during working hours
+			if is_during_working_hours(issue_creation_date, support_hours) and is_during_working_hours(first_responded_on, support_hours):
+				return get_elapsed_time(issue_creation_date, first_responded_on)
+
+			# issue creation is during working hours, but first response was after working hours
+			elif is_during_working_hours(issue_creation_date, support_hours):
+				return get_elapsed_time(issue_creation_time, end_time)
+
+			# issue creation was before working hours but first response is during working hours
+			elif is_during_working_hours(first_responded_on, support_hours):
+				return get_elapsed_time(start_time, first_responded_on_in_seconds)
+
+			# both issue creation and first response were after working hours
+			else:
+				return 1.0		# this should ideally be zero, but it gets reset when the next response is sent if the value is zero
+			
+		else:
+			return 1.0
+
+	else:
+		# response on the next day
+		if date_diff(first_responded_on, issue_creation_date) == 1:
+			first_response_time = 0
+		else:
+			first_response_time = calculate_initial_frt(issue_creation_date, date_diff(first_responded_on, issue_creation_date)- 1, support_hours)
+
+		# time taken on day of issue creation
+		if is_work_day(issue_creation_date, support_hours):
+			start_time, end_time = get_working_hours(issue_creation_date, support_hours)
+
+			if is_during_working_hours(issue_creation_date, support_hours):
+				first_response_time += get_elapsed_time(issue_creation_time, end_time)
+			elif is_before_working_hours(issue_creation_date, support_hours):
+				first_response_time += get_elapsed_time(start_time, end_time)
+
+		# time taken on day of first response
+		if is_work_day(first_responded_on, support_hours):
+			start_time, end_time = get_working_hours(first_responded_on, support_hours)
+
+			if is_during_working_hours(first_responded_on, support_hours):
+				first_response_time += get_elapsed_time(start_time, first_responded_on_in_seconds)
+			elif not is_before_working_hours(first_responded_on, support_hours):
+				first_response_time += get_elapsed_time(start_time, end_time)
+
+		if first_response_time:
+			return first_response_time
+		else:
+			return 1.0
+
+def get_time_in_seconds(date):
+	return timedelta(hours=date.hour, minutes=date.minute, seconds=date.second)
+
+def get_working_hours(date, support_hours):
+	if is_work_day(date, support_hours):
+		weekday = frappe.utils.get_weekday(date)
+		for day in support_hours:
+			if day.workday == weekday:
+				return day.start_time, day.end_time
+
+def is_work_day(date, support_hours):
+	weekday = frappe.utils.get_weekday(date)
+	for day in support_hours:
+		if day.workday == weekday:
+			return True
+	return False
+
+def is_during_working_hours(date, support_hours):
+	start_time, end_time = get_working_hours(date, support_hours)
+	time = get_time_in_seconds(date)
+	if time >= start_time and time <= end_time:
+		return True
+	return False
+
+def get_elapsed_time(start_time, end_time):
+	return round(time_diff_in_seconds(end_time, start_time), 2)
+
+def calculate_initial_frt(issue_creation_date, days_in_between, support_hours):
+	initial_frt = 0
+	for i in range(days_in_between):
+		date = issue_creation_date + timedelta(days = (i+1))
+		if is_work_day(date, support_hours):
+			start_time, end_time = get_working_hours(date, support_hours)
+			initial_frt += get_elapsed_time(start_time, end_time)
+
+	return initial_frt
+
+def is_before_working_hours(date, support_hours):
+	start_time, end_time = get_working_hours(date, support_hours)
+	time = get_time_in_seconds(date)
+	if time < start_time:
+		return True
+	return False
+
 def get_holidays(holiday_list_name):
 	holiday_list = frappe.get_cached_doc("Holiday List", holiday_list_name)
 	holidays = [holiday.holiday_date for holiday in holiday_list.holidays]
-	return holidays
\ No newline at end of file
+	return holidays
diff --git a/erpnext/support/doctype/issue/test_issue.py b/erpnext/support/doctype/issue/test_issue.py
index 7b9b144..84f8c39 100644
--- a/erpnext/support/doctype/issue/test_issue.py
+++ b/erpnext/support/doctype/issue/test_issue.py
@@ -5,16 +5,18 @@
 import frappe
 import unittest
 from erpnext.support.doctype.service_level_agreement.test_service_level_agreement import create_service_level_agreements_for_issues
-from frappe.utils import now_datetime, get_datetime, flt
+from frappe.core.doctype.user_permission.test_user_permission import create_user
+from frappe.utils import get_datetime, flt
 import datetime
 from datetime import timedelta
 
-class TestIssue(unittest.TestCase):
+class TestSetUp(unittest.TestCase):
 	def setUp(self):
 		frappe.db.sql("delete from `tabService Level Agreement`")
 		frappe.db.set_value("Support Settings", None, "track_service_level_agreement", 1)
 		create_service_level_agreements_for_issues()
 
+class TestIssue(TestSetUp):
 	def test_response_time_and_resolution_time_based_on_different_sla(self):
 		creation = datetime.datetime(2019, 3, 4, 12, 0)
 
@@ -133,6 +135,223 @@
 		issue.reload()
 		self.assertEqual(flt(issue.total_hold_time, 2), 2700)
 
+class TestFirstResponseTime(TestSetUp):
+	# working hours used in all cases: Mon-Fri, 10am to 6pm
+	# all dates are in the mm-dd-yyyy format
+
+	# issue creation and first response are on the same day
+	def test_first_response_time_case1(self):
+		"""
+			Test frt when issue creation and first response are during working hours on the same day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 11:00"), get_datetime("06-28-2021 12:00"))
+		self.assertEqual(issue.first_response_time, 3600.0)
+
+	def test_first_response_time_case2(self):
+		"""
+			Test frt when issue creation was during working hours, but first response is sent after working hours on the same day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 12:00"), get_datetime("06-28-2021 20:00"))
+		self.assertEqual(issue.first_response_time, 21600.0)
+
+	def test_first_response_time_case3(self):
+		"""
+			Test frt when issue creation was before working hours but first response is sent during working hours on the same day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 6:00"), get_datetime("06-28-2021 12:00"))
+		self.assertEqual(issue.first_response_time, 7200.0)
+
+	def test_first_response_time_case4(self):
+		"""
+			Test frt when both issue creation and first response were after working hours on the same day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 19:00"), get_datetime("06-28-2021 20:00"))
+		self.assertEqual(issue.first_response_time, 1.0)
+
+	def test_first_response_time_case5(self):
+		"""
+			Test frt when both issue creation and first response are on the same day, but it's not a work day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-27-2021 10:00"), get_datetime("06-27-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 1.0)
+
+	# issue creation and first response are on consecutive days
+	def test_first_response_time_case6(self):
+		"""
+			Test frt when the issue was created before working hours and the first response is also sent before working hours, but on the next day. 
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 6:00"), get_datetime("06-29-2021 6:00"))
+		self.assertEqual(issue.first_response_time, 28800.0)
+
+	def test_first_response_time_case7(self):
+		"""
+			Test frt when the issue was created before working hours and the first response is sent during working hours, but on the next day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 6:00"), get_datetime("06-29-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 32400.0)
+
+	def test_first_response_time_case8(self):
+		"""
+			Test frt when the issue was created before working hours and the first response is sent after working hours, but on the next day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 6:00"), get_datetime("06-29-2021 20:00"))
+		self.assertEqual(issue.first_response_time, 57600.0)
+
+	def test_first_response_time_case9(self):
+		"""
+			Test frt when the issue was created before working hours and the first response is sent on the next day, which is not a work day.
+		""" 
+		issue = create_issue_and_communication(get_datetime("06-25-2021 6:00"), get_datetime("06-26-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 28800.0)
+
+	def test_first_response_time_case10(self):
+		"""
+			Test frt when the issue was created during working hours and the first response is sent before working hours, but on the next day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 12:00"), get_datetime("06-29-2021 6:00"))
+		self.assertEqual(issue.first_response_time, 21600.0)
+
+	def test_first_response_time_case11(self):
+		"""
+			Test frt when the issue was created during working hours and the first response is also sent during working hours, but on the next day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 12:00"), get_datetime("06-29-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 25200.0)
+
+	def test_first_response_time_case12(self):
+		"""
+			Test frt when the issue was created during working hours and the first response is sent after working hours, but on the next day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 12:00"), get_datetime("06-29-2021 20:00"))
+		self.assertEqual(issue.first_response_time, 50400.0)
+
+	def test_first_response_time_case13(self):
+		"""
+			Test frt when the issue was created during working hours and the first response is sent on the next day, which is not a work day.
+		""" 
+		issue = create_issue_and_communication(get_datetime("06-25-2021 12:00"), get_datetime("06-26-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 21600.0)
+
+	def test_first_response_time_case14(self):
+		"""
+			Test frt when the issue was created after working hours and the first response is sent before working hours, but on the next day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 20:00"), get_datetime("06-29-2021 6:00"))
+		self.assertEqual(issue.first_response_time, 1.0)
+
+	def test_first_response_time_case15(self):
+		"""
+			Test frt when the issue was created after working hours and the first response is sent during working hours, but on the next day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 20:00"), get_datetime("06-29-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 3600.0)
+
+	def test_first_response_time_case16(self):
+		"""
+			Test frt when the issue was created after working hours and the first response is also sent after working hours, but on the next day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 20:00"), get_datetime("06-29-2021 20:00"))
+		self.assertEqual(issue.first_response_time, 28800.0)
+
+	def test_first_response_time_case17(self):
+		"""
+			Test frt when the issue was created after working hours and the first response is sent on the next day, which is not a work day.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-25-2021 20:00"), get_datetime("06-26-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 1.0)
+
+	# issue creation and first response are a few days apart
+	def test_first_response_time_case18(self):
+		"""
+			Test frt when the issue was created before working hours and the first response is also sent before working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 6:00"), get_datetime("07-01-2021 6:00"))
+		self.assertEqual(issue.first_response_time, 86400.0)
+
+	def test_first_response_time_case19(self):
+		"""
+			Test frt when the issue was created before working hours and the first response is sent during working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 6:00"), get_datetime("07-01-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 90000.0)
+
+	def test_first_response_time_case20(self):
+		"""
+			Test frt when the issue was created before working hours and the first response is sent after working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 6:00"), get_datetime("07-01-2021 20:00"))
+		self.assertEqual(issue.first_response_time, 115200.0)
+
+	def test_first_response_time_case21(self):
+		"""
+			Test frt when the issue was created before working hours and the first response is sent after a few days, on a holiday.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-25-2021 6:00"), get_datetime("06-27-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 28800.0)
+
+	def test_first_response_time_case22(self):
+		"""
+			Test frt when the issue was created during working hours and the first response is sent before working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 12:00"), get_datetime("07-01-2021 6:00"))
+		self.assertEqual(issue.first_response_time, 79200.0)
+
+	def test_first_response_time_case23(self):
+		"""
+			Test frt when the issue was created during working hours and the first response is also sent during working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 12:00"), get_datetime("07-01-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 82800.0)
+
+	def test_first_response_time_case24(self):
+		"""
+			Test frt when the issue was created during working hours and the first response is sent after working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 12:00"), get_datetime("07-01-2021 20:00"))
+		self.assertEqual(issue.first_response_time, 108000.0)
+
+	def test_first_response_time_case25(self):
+		"""
+			Test frt when the issue was created during working hours and the first response is sent after a few days, on a holiday.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-25-2021 12:00"), get_datetime("06-27-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 21600.0)
+
+	def test_first_response_time_case26(self):
+		"""
+			Test frt when the issue was created after working hours and the first response is sent before working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 20:00"), get_datetime("07-01-2021 6:00"))
+		self.assertEqual(issue.first_response_time, 57600.0)
+
+	def test_first_response_time_case27(self):
+		"""
+			Test frt when the issue was created after working hours and the first response is sent during working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 20:00"), get_datetime("07-01-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 61200.0)
+
+	def test_first_response_time_case28(self):
+		"""
+			Test frt when the issue was created after working hours and the first response is also sent after working hours, but after a few days.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-28-2021 20:00"), get_datetime("07-01-2021 20:00"))
+		self.assertEqual(issue.first_response_time, 86400.0)
+
+	def test_first_response_time_case29(self):
+		"""
+			Test frt when the issue was created after working hours and the first response is sent after a few days, on a holiday.
+		"""
+		issue = create_issue_and_communication(get_datetime("06-25-2021 20:00"), get_datetime("06-27-2021 11:00"))
+		self.assertEqual(issue.first_response_time, 1.0)
+	
+def create_issue_and_communication(issue_creation, first_responded_on):
+	issue = make_issue(issue_creation, index=1)
+	sender = create_user("test@admin.com")
+	create_communication(issue.name, sender.email, "Sent", first_responded_on)
+	issue.reload()
+
+	return issue
 
 def make_issue(creation=None, customer=None, index=0, priority=None, issue_type=None):
 	issue = frappe.get_doc({
@@ -185,7 +404,7 @@
 
 
 def create_communication(reference_name, sender, sent_or_received, creation):
-	issue = frappe.get_doc({
+	communication = frappe.get_doc({
 		"doctype": "Communication",
 		"communication_type": "Communication",
 		"communication_medium": "Email",
@@ -199,4 +418,4 @@
 		"creation": creation,
 		"reference_name": reference_name
 	})
-	issue.save()
+	communication.save()
\ No newline at end of file
diff --git a/erpnext/support/doctype/service_level_agreement/service_level_agreement.js b/erpnext/support/doctype/service_level_agreement/service_level_agreement.js
index 308bce4..ae2080c 100644
--- a/erpnext/support/doctype/service_level_agreement/service_level_agreement.js
+++ b/erpnext/support/doctype/service_level_agreement/service_level_agreement.js
@@ -5,15 +5,15 @@
 	setup: function(frm) {
 		if (cint(frm.doc.apply_sla_for_resolution) === 1) {
 			frm.get_field('priorities').grid.editable_fields = [
-				{fieldname: 'priority', columns: 1},
 				{fieldname: 'default_priority', columns: 1},
+				{fieldname: 'priority', columns: 2},
 				{fieldname: 'response_time', columns: 2},
 				{fieldname: 'resolution_time', columns: 2}
 			];
 		} else {
 			frm.get_field('priorities').grid.editable_fields = [
-				{fieldname: 'priority', columns: 1},
 				{fieldname: 'default_priority', columns: 1},
+				{fieldname: 'priority', columns: 2},
 				{fieldname: 'response_time', columns: 3},
 			];
 		}
diff --git a/erpnext/support/doctype/service_level_agreement/service_level_agreement.json b/erpnext/support/doctype/service_level_agreement/service_level_agreement.json
index de3389a..ef14b29 100644
--- a/erpnext/support/doctype/service_level_agreement/service_level_agreement.json
+++ b/erpnext/support/doctype/service_level_agreement/service_level_agreement.json
@@ -1,6 +1,6 @@
 {
  "actions": [],
- "autoname": "format:SLA-{document_type}-{service_level}-{####}",
+ "autoname": "format:SLA-{document_type}-{service_level}",
  "creation": "2018-12-26 21:08:15.448812",
  "doctype": "DocType",
  "editable_grid": 1,
diff --git a/erpnext/support/doctype/service_level_agreement/service_level_agreement.py b/erpnext/support/doctype/service_level_agreement/service_level_agreement.py
index 60e5fbe..8739cb2 100644
--- a/erpnext/support/doctype/service_level_agreement/service_level_agreement.py
+++ b/erpnext/support/doctype/service_level_agreement/service_level_agreement.py
@@ -797,7 +797,7 @@
 	if meta.has_field("response_by"):
 		doc.response_by = get_expected_time_for(parameter="response", service_level=priority, start_date_time=start_date_time)
 
-	if meta.has_field("response_by_variance"):
+	if meta.has_field("response_by_variance") and not doc.get('first_responded_on'):
 		now_time = frappe.flags.current_time or now_datetime(doc.get("owner"))
 		doc.response_by_variance = round(time_diff_in_seconds(doc.response_by, now_time), 2)
 
@@ -805,7 +805,7 @@
 	if meta.has_field("resolution_by"):
 		doc.resolution_by = get_expected_time_for(parameter="resolution", service_level=priority, start_date_time=start_date_time)
 
-	if meta.has_field("resolution_by_variance"):
+	if meta.has_field("resolution_by_variance") and not doc.get("resolution_date"):
 		now_time = frappe.flags.current_time or now_datetime(doc.get("owner"))
 		doc.resolution_by_variance = round(time_diff_in_seconds(doc.resolution_by, now_time), 2)
 
diff --git a/erpnext/support/doctype/service_level_agreement/test_service_level_agreement.py b/erpnext/support/doctype/service_level_agreement/test_service_level_agreement.py
index 7c18a65..7bc97d6 100644
--- a/erpnext/support/doctype/service_level_agreement/test_service_level_agreement.py
+++ b/erpnext/support/doctype/service_level_agreement/test_service_level_agreement.py
@@ -217,6 +217,42 @@
 		lead.reload()
 		self.assertEqual(lead.agreement_status, 'Fulfilled')
 
+	def test_changing_of_variance_after_response(self):
+		# create lead
+		doctype = "Lead"
+		lead_sla = create_service_level_agreement(
+			default_service_level_agreement=1,
+			holiday_list="__Test Holiday List",
+			entity_type=None, entity=None,
+			response_time=14400,
+			doctype=doctype,
+			sla_fulfilled_on=[{"status": "Replied"}],
+			apply_sla_for_resolution=0
+		)
+		creation = datetime.datetime(2019, 3, 4, 12, 0)
+		lead = make_lead(creation=creation, index=2)
+		self.assertEqual(lead.service_level_agreement, lead_sla.name)
+
+		# set lead as replied to set first responded on
+		frappe.flags.current_time = datetime.datetime(2019, 3, 4, 15, 30)
+		lead.reload()
+		lead.status = 'Replied'
+		lead.save()
+		lead.reload()
+		self.assertEqual(lead.agreement_status, 'Fulfilled')
+
+		# check response_by_variance
+		self.assertEqual(lead.first_responded_on, frappe.flags.current_time)
+		self.assertEqual(lead.response_by_variance, 1800.0)
+
+		# make a change on the document &
+		# check response_by_variance is unchanged
+		frappe.flags.current_time = datetime.datetime(2019, 3, 4, 18, 30)
+		lead.status = 'Open'
+		lead.save()
+		lead.reload()
+		self.assertEqual(lead.response_by_variance, 1800.0)
+
 	def tearDown(self):
 		for d in frappe.get_all("Service Level Agreement"):
 			frappe.delete_doc("Service Level Agreement", d.name, force=1)
@@ -249,7 +285,7 @@
 		"doctype": "Service Level Agreement",
 		"enabled": 1,
 		"document_type": doctype,
-		"service_level": "__Test Service Level",
+		"service_level": "__Test {} SLA".format(entity_type if entity_type else "Default"),
 		"default_service_level_agreement": default_service_level_agreement,
 		"default_priority": "Medium",
 		"holiday_list": holiday_list,
@@ -303,16 +339,6 @@
 				"workday": "Friday",
 				"start_time": "10:00:00",
 				"end_time": "18:00:00",
-			},
-			{
-				"workday": "Saturday",
-				"start_time": "10:00:00",
-				"end_time": "18:00:00",
-			},
-			{
-				"workday": "Sunday",
-				"start_time": "10:00:00",
-				"end_time": "18:00:00",
 			}
 		]
 	})
diff --git a/erpnext/support/doctype/service_level_priority/service_level_priority.json b/erpnext/support/doctype/service_level_priority/service_level_priority.json
index 0367fc6..b410fe6 100644
--- a/erpnext/support/doctype/service_level_priority/service_level_priority.json
+++ b/erpnext/support/doctype/service_level_priority/service_level_priority.json
@@ -5,9 +5,9 @@
  "editable_grid": 1,
  "engine": "InnoDB",
  "field_order": [
-  "priority",
-  "cb_01",
   "default_priority",
+  "cb_01",
+  "priority",
   "sb_00",
   "response_time",
   "cb_00",
@@ -15,7 +15,7 @@
  ],
  "fields": [
   {
-   "columns": 1,
+   "columns": 2,
    "fieldname": "priority",
    "fieldtype": "Link",
    "in_list_view": 1,
@@ -64,7 +64,7 @@
  ],
  "istable": 1,
  "links": [],
- "modified": "2021-05-29 19:52:51.733248",
+ "modified": "2021-06-21 12:00:58.089962",
  "modified_by": "Administrator",
  "module": "Support",
  "name": "Service Level Priority",