diff --git a/erpnext/accounts/doctype/payment_entry/regional/india.js b/erpnext/accounts/doctype/payment_entry/regional/india.js
new file mode 100644
index 0000000..fa35ec9
--- /dev/null
+++ b/erpnext/accounts/doctype/payment_entry/regional/india.js
@@ -0,0 +1,29 @@
+frappe.ui.form.on("Payment Entry", {
+	company: function(frm) {
+		frappe.call({
+			'method': 'frappe.contacts.doctype.address.address.get_default_address',
+			'args': {
+				'doctype': 'Company',
+				'name': frm.doc.company
+			},
+			'callback': function(r) {
+				me.frm.set_value('company_address', r.message);
+			}
+		});
+	},
+
+	party: function(frm) {
+		if (frm.doc.party_type == "Customer" && frm.doc.party) {
+			frappe.call({
+				'method': 'frappe.contacts.doctype.address.address.get_default_address',
+				'args': {
+					'doctype': 'Customer',
+					'name': frm.doc.party
+				},
+				'callback': function(r) {
+					me.frm.set_value('customer_address', r.message);
+				}
+			});
+		}
+	}
+});
\ No newline at end of file
diff --git a/erpnext/hooks.py b/erpnext/hooks.py
index b1a64f9..8a4f4f5 100644
--- a/erpnext/hooks.py
+++ b/erpnext/hooks.py
@@ -286,6 +286,7 @@
 		]
 	},
 	"Payment Entry": {
+		"validate": "erpnext.regional.india.utils.update_place_of_supply",
 		"on_submit": ["erpnext.regional.create_transaction_log", "erpnext.accounts.doctype.payment_request.payment_request.update_payment_req_status", "erpnext.accounts.doctype.dunning.dunning.resolve_dunning"],
 		"on_trash": "erpnext.regional.check_deletion_permission"
 	},
diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 05c385b..b8b7713 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -300,4 +300,5 @@
 erpnext.patches.v13_0.einvoicing_deprecation_warning
 erpnext.patches.v14_0.delete_einvoicing_doctypes
 erpnext.patches.v13_0.set_operation_time_based_on_operating_cost
-erpnext.patches.v13_0.validate_options_for_data_field
\ No newline at end of file
+erpnext.patches.v13_0.validate_options_for_data_field
+erpnext.patches.v13_0.create_gst_payment_entry_fields
diff --git a/erpnext/patches/v13_0/create_gst_payment_entry_fields.py b/erpnext/patches/v13_0/create_gst_payment_entry_fields.py
new file mode 100644
index 0000000..aee5ce6
--- /dev/null
+++ b/erpnext/patches/v13_0/create_gst_payment_entry_fields.py
@@ -0,0 +1,31 @@
+# Copyright (c) 2021, Frappe and Contributors
+# License: GNU General Public License v3. See license.txt
+
+from __future__ import unicode_literals
+import frappe
+from frappe.custom.doctype.custom_field.custom_field import create_custom_fields
+
+def execute():
+	custom_fields = {
+		'Payment Entry': [
+			dict(fieldname='gst_section', label='GST Details', fieldtype='Section Break', insert_after='deductions',
+				print_hide=1, collapsible=1),
+			dict(fieldname='company_address', label='Company Address', fieldtype='Link', insert_after='gst_section',
+				print_hide=1, options='Address'),
+			dict(fieldname='company_gstin', label='Company GSTIN',
+				fieldtype='Data', insert_after='company_address',
+				fetch_from='company_address.gstin', print_hide=1, read_only=1),
+			dict(fieldname='place_of_supply', label='Place of Supply',
+				fieldtype='Data', insert_after='company_gstin',
+				print_hide=1, read_only=1),
+			dict(fieldname='gst_column_break', fieldtype='Column Break',
+					insert_after='place_of_supply'),
+			dict(fieldname='customer_address', label='Customer Address', fieldtype='Link', insert_after='gst_column_break',
+				print_hide=1, options='Address', depends_on = 'eval:doc.party_type == "Customer"'),
+			dict(fieldname='customer_gstin', label='Customer GSTIN',
+				fieldtype='Data', insert_after='customer_address',
+				fetch_from='customer_address.gstin', print_hide=1, read_only=1)
+		]
+	}
+
+	create_custom_fields(custom_fields, update=True)
\ No newline at end of file
diff --git a/erpnext/regional/india/setup.py b/erpnext/regional/india/setup.py
index 4db5551..638a8ed 100644
--- a/erpnext/regional/india/setup.py
+++ b/erpnext/regional/india/setup.py
@@ -123,8 +123,8 @@
 def make_property_setters(patch=False):
 	# GST rules do not allow for an invoice no. bigger than 16 characters
 	journal_entry_types = frappe.get_meta("Journal Entry").get_options("voucher_type").split("\n") + ['Reversal Of ITC']
-	sales_invoice_series = ['SINV-.YY.-', 'SRET-.YY.-', ''] + frappe.get_meta("Sales Invoice").get_options("naming_series").split("\n")
-	purchase_invoice_series = ['PINV-.YY.-', 'PRET-.YY.-', ''] + frappe.get_meta("Purchase Invoice").get_options("naming_series").split("\n")
+	sales_invoice_series = frappe.get_meta("Sales Invoice").get_options("naming_series").split("\n") + ['SINV-.YY.-', 'SRET-.YY.-', '']
+	purchase_invoice_series = frappe.get_meta("Purchase Invoice").get_options("naming_series").split("\n") + ['PINV-.YY.-', 'PRET-.YY.-', '']
 
 	if not patch:
 		make_property_setter('Sales Invoice', 'naming_series', 'options', '\n'.join(sales_invoice_series), '')
@@ -464,6 +464,7 @@
 		'Purchase Receipt': purchase_invoice_gst_fields,
 		'Sales Invoice': sales_invoice_gst_category + invoice_gst_fields + sales_invoice_shipping_fields + sales_invoice_gst_fields + si_ewaybill_fields,
 		'Delivery Note': sales_invoice_gst_fields + ewaybill_fields + sales_invoice_shipping_fields + delivery_note_gst_category,
+		'Payment Entry': payment_entry_fields,
 		'Journal Entry': journal_entry_fields,
 		'Sales Order': sales_invoice_gst_fields,
 		'Tax Category': inter_state_gst_field,
diff --git a/erpnext/regional/india/utils.py b/erpnext/regional/india/utils.py
index ce5aa10..94910fe 100644
--- a/erpnext/regional/india/utils.py
+++ b/erpnext/regional/india/utils.py
@@ -767,6 +767,15 @@
 		if tax.account_head in gst_accounts.get('cess_account', []):
 			doc.itc_cess_amount += flt(tax.base_tax_amount_after_discount_amount)
 
+def update_place_of_supply(doc, method):
+	country = frappe.get_cached_value('Company', doc.company, 'country')
+	if country != 'India':
+		return
+
+	address = frappe.db.get_value("Address", doc.customer_address, ["gst_state", "gst_state_number"], as_dict=1)
+	if address and address.gst_state and address.gst_state_number:
+		doc.place_of_supply = cstr(address.gst_state_number) + "-" + cstr(address.gst_state)
+
 @frappe.whitelist()
 def get_regional_round_off_accounts(company, account_list):
 	country = frappe.get_cached_value('Company', company, 'country')
diff --git a/erpnext/regional/report/gstr_1/gstr_1.js b/erpnext/regional/report/gstr_1/gstr_1.js
index 4a8e67f..ef2bdb6 100644
--- a/erpnext/regional/report/gstr_1/gstr_1.js
+++ b/erpnext/regional/report/gstr_1/gstr_1.js
@@ -52,7 +52,8 @@
 				{ "value": "B2C Small", "label": __("B2C(Small) Invoices - 7") },
 				{ "value": "CDNR-REG", "label": __("Credit/Debit Notes (Registered) - 9B") },
 				{ "value": "CDNR-UNREG", "label": __("Credit/Debit Notes (Unregistered) - 9B") },
-				{ "value": "EXPORT", "label": __("Export Invoice - 6A") }
+				{ "value": "EXPORT", "label": __("Export Invoice - 6A") },
+				{ "value": "Advances", "label": __("Tax Liability (Advances Received) - 11A(1), 11A(2)") }
 			],
 			"default": "B2B"
 		}
diff --git a/erpnext/regional/report/gstr_1/gstr_1.py b/erpnext/regional/report/gstr_1/gstr_1.py
index 827fbb8..312f7e2 100644
--- a/erpnext/regional/report/gstr_1/gstr_1.py
+++ b/erpnext/regional/report/gstr_1/gstr_1.py
@@ -50,14 +50,17 @@
 			self.get_invoice_items()
 			self.get_items_based_on_tax_rate()
 			self.invoice_fields = [d["fieldname"] for d in self.invoice_columns]
-			self.get_data()
+		
+		self.get_data()
 
 		return self.columns, self.data
 
 	def get_data(self):
 		if self.filters.get("type_of_business") in  ("B2C Small", "B2C Large"):
 			self.get_b2c_data()
-		else:
+		elif self.filters.get("type_of_business") in  ("Advances"):
+			self.get_advance_data()
+		elif self.invoices:
 			for inv, items_based_on_rate in self.items_based_on_tax_rate.items():
 				invoice_details = self.invoices.get(inv)
 				for rate, items in items_based_on_rate.items():
@@ -70,6 +73,22 @@
 					if taxable_value:
 						self.data.append(row)
 
+	def get_advance_data(self):
+		advances_data = {}
+		advances = self.get_advance_entries()
+		for entry in advances:
+			# only consider IGST and SGST so as to avoid duplication of taxable amount
+			if entry.account_head in self.gst_accounts.igst_account or \
+				entry.account_head in self.gst_accounts.sgst_account:
+				advances_data.setdefault((entry.place_of_supply, entry.rate), [0.0, 0.0])
+				advances_data[(entry.place_of_supply, entry.rate)][0] += (entry.amount * 100 / entry.rate)
+			elif entry.account_head in self.gst_accounts.cess_account:
+				advances_data[(entry.place_of_supply, entry.rate)][1] += entry.amount
+
+		for key, value in advances_data.items():
+			row= [key[0], key[1], value[0], value[1]]
+			self.data.append(row)
+
 	def get_b2c_data(self):
 		b2cs_output = {}
 
@@ -167,6 +186,16 @@
 		for d in invoice_data:
 			self.invoices.setdefault(d.invoice_number, d)
 
+	def get_advance_entries(self):
+		return frappe.db.sql("""
+			SELECT SUM(a.base_tax_amount) as amount, a.account_head, a.rate, p.place_of_supply
+			FROM `tabPayment Entry` p, `tabAdvance Taxes and Charges` a
+			WHERE p.docstatus = 1
+			AND p.name = a.parent
+			AND posting_date between %s and %s
+			GROUP BY a.account_head, p.place_of_supply, a.rate
+		""", (self.filters.get('from_date'), self.filters.get('to_date')), as_dict=1)
+
 	def get_conditions(self):
 		conditions = ""
 
@@ -662,6 +691,25 @@
 					"width": 120
 				}
 			]
+		elif self.filters.get("type_of_business") ==  "Advances":
+			self.invoice_columns = [
+				{
+					"fieldname": "place_of_supply",
+					"label": "Place Of Supply",
+					"fieldtype": "Data",
+					"width": 120
+				}
+			]
+
+			self.other_columns = [
+				{
+						"fieldname": "cess_amount",
+						"label": "Cess Amount",
+						"fieldtype": "Currency",
+						"width": 100
+				}
+			]
+			
 		self.columns = self.invoice_columns + self.tax_columns + self.other_columns
 
 @frappe.whitelist()
@@ -700,19 +748,29 @@
 
 		out = get_export_json(res)
 		gst_json["exp"] = out
-	elif filters["type_of_business"] == 'CDNR-REG':
+	elif filters["type_of_business"] == "CDNR-REG":
 		for item in report_data[:-1]:
 			res.setdefault(item["customer_gstin"], {}).setdefault(item["invoice_number"],[]).append(item)
 
 		out = get_cdnr_reg_json(res, gstin)
 		gst_json["cdnr"] = out
-	elif filters["type_of_business"] == 'CDNR-UNREG':
+	elif filters["type_of_business"] == "CDNR-UNREG":
 		for item in report_data[:-1]:
 			res.setdefault(item["invoice_number"],[]).append(item)
 
 		out = get_cdnr_unreg_json(res, gstin)
 		gst_json["cdnur"] = out
 
+	elif filters["type_of_business"] == "Advances":
+		for item in report_data[:-1]:
+			if not item.get("place_of_supply"):
+				frappe.throw(_("""{0} not entered in some entries.
+					Please update and try again""").format(frappe.bold("Place Of Supply")))
+
+			res.setdefault(item["place_of_supply"],[]).append(item)
+
+		out = get_advances_json(res, gstin)
+		gst_json["at"] = out
 
 	return {
 		'report_name': report_name,
@@ -792,6 +850,40 @@
 
 	return out
 
+def get_advances_json(data, gstin):
+	company_state_number = gstin[0:2]
+	out = []
+	for place_of_supply, items in iteritems(data):
+		supply_type = "INTRA" if company_state_number == place_of_supply.split('-')[0] else "INTER"
+		row = {
+			"pos": place_of_supply.split('-')[0],
+			"itms": [],
+			"sply_ty": supply_type
+		}
+
+		for item in items:
+			itms = {
+				'rt': item['rate'],
+				'ad_amount': flt(item.get('taxable_value')),
+				'csamt': flt(item.get('cess_amount'))
+			}
+
+			if supply_type == "INTRA":
+				itms.update({
+					"samt": flt((itms["ad_amount"] * itms["rt"]) / 100),
+					"camt": flt((itms["ad_amount"] * itms["rt"]) / 100),
+					"rt": itms["rt"] * 2
+				})
+			else:
+				itms.update({
+					"iamt": flt((itms["ad_amount"] * itms["rt"]) / 100)
+				})
+
+			row['itms'].append(itms)
+		out.append(row)
+
+	return out
+
 def get_b2cl_json(res, gstin):
 	out = []
 	for pos in res:
@@ -955,7 +1047,7 @@
 			["Dynamic Link", "link_name", "=", company],
 			["Dynamic Link", "parenttype", "=", "Address"],
 		]
-		gstin = frappe.get_all("Address", filters=filters, pluck="gstin")
+		gstin = frappe.get_all("Address", filters=filters, pluck="gstin", order_by="is_primary_address desc")
 		if gstin and not all_gstins:
 			gstin = gstin[0]