diff --git a/erpnext/accounts/doctype/sales_invoice/regional/india_list.js b/erpnext/accounts/doctype/sales_invoice/regional/india_list.js
index 3e1c522..ada665a 100644
--- a/erpnext/accounts/doctype/sales_invoice/regional/india_list.js
+++ b/erpnext/accounts/doctype/sales_invoice/regional/india_list.js
@@ -1,14 +1,14 @@
 var globalOnload = frappe.listview_settings['Sales Invoice'].onload;
-frappe.listview_settings['Sales Invoice'].onload = function (doclist) {
+frappe.listview_settings['Sales Invoice'].onload = function (list_view) {
 
 	// Provision in case onload event is added to sales_invoice.js in future
 	if (globalOnload) {
-		globalOnload(doclist);
+		globalOnload(list_view);
 	}
 
 	const action = () => {
-		const selected_docs = doclist.get_checked_items();
-		const docnames = doclist.get_checked_items(true);
+		const selected_docs = list_view.get_checked_items();
+		const docnames = list_view.get_checked_items(true);
 
 		for (let doc of selected_docs) {
 			if (doc.docstatus !== 1) {
@@ -19,7 +19,7 @@
 		frappe.call({
 			method: 'erpnext.regional.india.utils.generate_ewb_json',
 			args: {
-				'dt': doclist.doctype,
+				'dt': list_view.doctype,
 				'dn': docnames
 			},
 			callback: function(r) {
@@ -35,5 +35,140 @@
 		});
 	};
 
-	doclist.page.add_actions_menu_item(__('Generate E-Way Bill JSON'), action, false);
+	list_view.page.add_actions_menu_item(__('Generate E-Way Bill JSON'), action, false);
+
+	const generate_irns = () => {
+		const docnames = list_view.get_checked_items(true);
+		if (docnames && docnames.length) {
+			frappe.call({
+				method: 'erpnext.regional.india.e_invoice.utils.generate_einvoices',
+				args: { docnames },
+				freeze: true,
+				freeze_message: __('Generating E-Invoices...')
+			});
+		} else {
+			frappe.msgprint({
+				message: __('Please select at least one sales invoice to generate IRN'),
+				title: __('No Invoice Selected'),
+				indicator: 'red'
+			});
+		}
+	};
+
+	const cancel_irns = () => {
+		const docnames = list_view.get_checked_items(true);
+
+		const fields = [
+			{
+				"label": "Reason",
+				"fieldname": "reason",
+				"fieldtype": "Select",
+				"reqd": 1,
+				"default": "1-Duplicate",
+				"options": ["1-Duplicate", "2-Data Entry Error", "3-Order Cancelled", "4-Other"]
+			},
+			{ 
+				"label": "Remark",
+				"fieldname": "remark",
+				"fieldtype": "Data",
+				"reqd": 1
+			}
+		];
+
+		const d = new frappe.ui.Dialog({
+			title: __("Cancel IRN"),
+			fields: fields,
+			primary_action: function() {
+				const data = d.get_values();
+				frappe.call({
+					method: 'erpnext.regional.india.e_invoice.utils.cancel_irns',
+					args: { 
+						doctype: list_view.doctype,
+						docnames,
+						reason: data.reason.split('-')[0],
+						remark: data.remark
+					},
+					freeze: true,
+					freeze_message: __('Cancelling E-Invoices...'),
+				});
+				d.hide();
+			},
+			primary_action_label: __('Submit')
+		});
+		d.show();
+	};
+
+	let einvoicing_enabled = false;
+	frappe.db.get_single_value("E Invoice Settings", "enable").then(enabled => {
+		einvoicing_enabled = enabled;
+	});
+
+	list_view.$result.on("change", "input[type=checkbox]", () => {
+		if (einvoicing_enabled) {
+			const docnames = list_view.get_checked_items(true);
+			// show/hide e-invoicing actions when no sales invoices are checked
+			if (docnames && docnames.length) {
+				// prevent adding actions twice if e-invoicing action group already exists
+				if (list_view.page.get_inner_group_button(__('E-Invoicing')).length == 0) {
+					list_view.page.add_inner_button(__('Generate IRNs'), generate_irns, __('E-Invoicing'));
+					list_view.page.add_inner_button(__('Cancel IRNs'), cancel_irns, __('E-Invoicing'));
+				}
+			} else {
+				list_view.page.remove_inner_button(__('Generate IRNs'), __('E-Invoicing'));
+				list_view.page.remove_inner_button(__('Cancel IRNs'), __('E-Invoicing'));
+			}
+		}
+	});
+
+	frappe.realtime.on("bulk_einvoice_generation_complete", (data) => {
+		const { failures, user, invoices } = data;
+		
+		if (invoices.length != failures.length) {
+			frappe.msgprint({
+				message: __('{0} e-invoices generated successfully', [invoices.length]),
+				title: __('Bulk E-Invoice Generation Complete'),
+				indicator: 'orange'
+			});
+		}
+
+		if (failures && failures.length && user == frappe.session.user) {
+			let message = `
+				Failed to generate IRNs for following ${failures.length} sales invoices:
+				<ul style="padding-left: 20px; padding-top: 5px;">
+					${failures.map(d => `<li>${d.docname}</li>`).join('')}
+				</ul>
+			`;
+			frappe.msgprint({
+				message: message,
+				title: __('Bulk E-Invoice Generation Complete'),
+				indicator: 'orange'
+			});
+		}
+	});
+
+	frappe.realtime.on("bulk_einvoice_cancellation_complete", (data) => {
+		const { failures, user, invoices } = data;
+
+		if (invoices.length != failures.length) {
+			frappe.msgprint({
+				message: __('{0} e-invoices cancelled successfully', [invoices.length]),
+				title: __('Bulk E-Invoice Cancellation Complete'),
+				indicator: 'orange'
+			});
+		}
+
+		if (failures && failures.length && user == frappe.session.user) {
+			let message = `
+				Failed to cancel IRNs for following ${failures.length} sales invoices:
+				<ul style="padding-left: 20px; padding-top: 5px;">
+					${failures.map(d => `<li>${d.docname}</li>`).join('')}
+				</ul>
+			`;
+			frappe.msgprint({
+				message: message,
+				title: __('Bulk E-Invoice Cancellation Complete'),
+				indicator: 'orange'
+			});
+		}
+	});
 };
\ No newline at end of file
diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index d6176fd..7c842fc 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -756,12 +756,15 @@
 erpnext.patches.v12_0.add_state_code_for_ladakh
 erpnext.patches.v13_0.item_reposting_for_incorrect_sl_and_gl
 erpnext.patches.v13_0.delete_old_bank_reconciliation_doctypes
-erpnext.patches.v13_0.update_vehicle_no_reqd_condition
+erpnext.patches.v12_0.update_vehicle_no_reqd_condition
+erpnext.patches.v12_0.add_einvoice_status_field #2021-03-17
+erpnext.patches.v12_0.add_einvoice_summary_report_permissions
 erpnext.patches.v13_0.setup_fields_for_80g_certificate_and_donation
 erpnext.patches.v13_0.rename_membership_settings_to_non_profit_settings
 erpnext.patches.v13_0.setup_gratuity_rule_for_india_and_uae
 erpnext.patches.v13_0.setup_uae_vat_fields
 execute:frappe.db.set_value('System Settings', None, 'app_name', 'ERPNext')
+erpnext.patches.v12_0.add_company_link_to_einvoice_settings
 erpnext.patches.v13_0.rename_discharge_date_in_ip_record
 erpnext.patches.v12_0.create_taxable_value_field
 erpnext.patches.v12_0.add_gst_category_in_delivery_note
diff --git a/erpnext/patches/v12_0/add_company_link_to_einvoice_settings.py b/erpnext/patches/v12_0/add_company_link_to_einvoice_settings.py
new file mode 100644
index 0000000..fe284e8
--- /dev/null
+++ b/erpnext/patches/v12_0/add_company_link_to_einvoice_settings.py
@@ -0,0 +1,16 @@
+from __future__ import unicode_literals
+import frappe
+
+def execute():
+	company = frappe.get_all('Company', filters = {'country': 'India'})
+	if not company or not frappe.db.count('E Invoice User'):
+		return
+
+	frappe.reload_doc("regional", "doctype", "e_invoice_user")
+	for creds in frappe.db.get_all('E Invoice User', fields=['name', 'gstin']):
+		company_name = frappe.db.sql("""
+			select dl.link_name from `tabAddress` a, `tabDynamic Link` dl
+			where a.gstin = %s and dl.parent = a.name and dl.link_doctype = 'Company'
+		""", (creds.get('gstin')))
+		if company_name[0]:
+			frappe.db.set_value('E Invoice User', creds.get('name'), 'company', company_name[0][0])
\ No newline at end of file
diff --git a/erpnext/patches/v12_0/add_einvoice_status_field.py b/erpnext/patches/v12_0/add_einvoice_status_field.py
new file mode 100644
index 0000000..387e885
--- /dev/null
+++ b/erpnext/patches/v12_0/add_einvoice_status_field.py
@@ -0,0 +1,69 @@
+from __future__ import unicode_literals
+import json
+import frappe
+from frappe.custom.doctype.custom_field.custom_field import create_custom_fields
+
+def execute():
+	company = frappe.get_all('Company', filters = {'country': 'India'})
+	if not company:
+		return
+
+	# move hidden einvoice fields to a different section
+	custom_fields = {
+		'Sales Invoice': [
+			dict(fieldname='einvoice_section', label='E-Invoice Fields', fieldtype='Section Break', insert_after='gst_vehicle_type',
+			print_hide=1, hidden=1),
+		
+			dict(fieldname='ack_no', label='Ack. No.', fieldtype='Data', read_only=1, hidden=1, insert_after='einvoice_section',
+				no_copy=1, print_hide=1),
+			
+			dict(fieldname='ack_date', label='Ack. Date', fieldtype='Data', read_only=1, hidden=1, insert_after='ack_no', no_copy=1, print_hide=1),
+
+			dict(fieldname='irn_cancel_date', label='Cancel Date', fieldtype='Data', read_only=1, hidden=1, insert_after='ack_date', 
+				no_copy=1, print_hide=1),
+
+			dict(fieldname='signed_einvoice', label='Signed E-Invoice', fieldtype='Code', options='JSON', hidden=1, insert_after='irn_cancel_date',
+				no_copy=1, print_hide=1, read_only=1),
+
+			dict(fieldname='signed_qr_code', label='Signed QRCode', fieldtype='Code', options='JSON', hidden=1, insert_after='signed_einvoice',
+				no_copy=1, print_hide=1, read_only=1),
+
+			dict(fieldname='qrcode_image', label='QRCode', fieldtype='Attach Image', hidden=1, insert_after='signed_qr_code',
+				no_copy=1, print_hide=1, read_only=1),
+
+			dict(fieldname='einvoice_status', label='E-Invoice Status', fieldtype='Select', insert_after='qrcode_image',
+				options='\nPending\nGenerated\nCancelled\nFailed', default=None, hidden=1, no_copy=1, print_hide=1, read_only=1),
+
+			dict(fieldname='failure_description', label='E-Invoice Failure Description', fieldtype='Code', options='JSON',
+				hidden=1, insert_after='einvoice_status', no_copy=1, print_hide=1, read_only=1)
+		]
+	}
+	create_custom_fields(custom_fields, update=True)
+
+	if frappe.db.exists('E Invoice Settings') and frappe.db.get_single_value('E Invoice Settings', 'enable'):
+		frappe.db.sql('''
+			UPDATE `tabSales Invoice` SET einvoice_status = 'Pending'
+			WHERE
+				posting_date >= '2021-04-01'
+				AND ifnull(irn, '') = ''
+				AND ifnull(`billing_address_gstin`, '') != ifnull(`company_gstin`, '')
+				AND ifnull(gst_category, '') in ('Registered Regular', 'SEZ', 'Overseas', 'Deemed Export')
+		''')
+
+		# set appropriate statuses
+		frappe.db.sql('''UPDATE `tabSales Invoice` SET einvoice_status = 'Generated'
+			WHERE ifnull(irn, '') != '' AND ifnull(irn_cancelled, 0) = 0''')
+
+		frappe.db.sql('''UPDATE `tabSales Invoice` SET einvoice_status = 'Cancelled'
+			WHERE ifnull(irn_cancelled, 0) = 1''')
+
+	# set correct acknowledgement in e-invoices
+	einvoices = frappe.get_all('Sales Invoice', {'irn': ['is', 'set']}, ['name', 'signed_einvoice'])
+
+	if einvoices:
+		for inv in einvoices:
+			signed_einvoice = inv.get('signed_einvoice')
+			if signed_einvoice:
+				signed_einvoice = json.loads(signed_einvoice)
+				frappe.db.set_value('Sales Invoice', inv.get('name'), 'ack_no', signed_einvoice.get('AckNo'), update_modified=False)
+				frappe.db.set_value('Sales Invoice', inv.get('name'), 'ack_date', signed_einvoice.get('AckDt'), update_modified=False)
\ No newline at end of file
diff --git a/erpnext/patches/v12_0/add_einvoice_summary_report_permissions.py b/erpnext/patches/v12_0/add_einvoice_summary_report_permissions.py
new file mode 100644
index 0000000..bf8f566
--- /dev/null
+++ b/erpnext/patches/v12_0/add_einvoice_summary_report_permissions.py
@@ -0,0 +1,18 @@
+from __future__ import unicode_literals
+import frappe
+
+def execute():
+	company = frappe.get_all('Company', filters = {'country': 'India'})
+	if not company:
+		return
+
+	if frappe.db.exists('Report', 'E-Invoice Summary') and \
+		not frappe.db.get_value('Custom Role', dict(report='E-Invoice Summary')):
+		frappe.get_doc(dict(
+			doctype='Custom Role',
+			report='E-Invoice Summary',
+			roles= [
+				dict(role='Accounts User'),
+				dict(role='Accounts Manager')
+			]
+		)).insert()	
\ No newline at end of file
diff --git a/erpnext/patches/v13_0/update_vehicle_no_reqd_condition.py b/erpnext/patches/v12_0/update_vehicle_no_reqd_condition.py
similarity index 100%
rename from erpnext/patches/v13_0/update_vehicle_no_reqd_condition.py
rename to erpnext/patches/v12_0/update_vehicle_no_reqd_condition.py
diff --git a/erpnext/regional/doctype/e_invoice_settings/e_invoice_settings.json b/erpnext/regional/doctype/e_invoice_settings/e_invoice_settings.json
index db8bda7..68ed339 100644
--- a/erpnext/regional/doctype/e_invoice_settings/e_invoice_settings.json
+++ b/erpnext/regional/doctype/e_invoice_settings/e_invoice_settings.json
@@ -8,6 +8,7 @@
   "enable",
   "section_break_2",
   "sandbox_mode",
+  "applicable_from",
   "credentials",
   "auth_token",
   "token_expiry"
@@ -48,12 +49,19 @@
    "fieldname": "sandbox_mode",
    "fieldtype": "Check",
    "label": "Sandbox Mode"
+  },
+  {
+   "fieldname": "applicable_from",
+   "fieldtype": "Date",
+   "in_list_view": 1,
+   "label": "Applicable From",
+   "reqd": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "issingle": 1,
  "links": [],
- "modified": "2021-01-13 12:04:49.449199",
+ "modified": "2021-03-30 12:26:25.538294",
  "modified_by": "Administrator",
  "module": "Regional",
  "name": "E Invoice Settings",
diff --git a/erpnext/regional/doctype/e_invoice_user/e_invoice_user.json b/erpnext/regional/doctype/e_invoice_user/e_invoice_user.json
index dd9d997..a65b1ca 100644
--- a/erpnext/regional/doctype/e_invoice_user/e_invoice_user.json
+++ b/erpnext/regional/doctype/e_invoice_user/e_invoice_user.json
@@ -5,6 +5,7 @@
  "editable_grid": 1,
  "engine": "InnoDB",
  "field_order": [
+  "company",
   "gstin",
   "username",
   "password"
@@ -30,12 +31,20 @@
    "in_list_view": 1,
    "label": "Password",
    "reqd": 1
+  },
+  {
+   "fieldname": "company",
+   "fieldtype": "Link",
+   "in_list_view": 1,
+   "label": "Company",
+   "options": "Company",
+   "reqd": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2020-12-22 15:10:53.466205",
+ "modified": "2021-03-22 12:16:56.365616",
  "modified_by": "Administrator",
  "module": "Regional",
  "name": "E Invoice User",
diff --git a/erpnext/regional/india/e_invoice/einvoice.js b/erpnext/regional/india/e_invoice/einvoice.js
index 7cd64f2..c1a222a 100644
--- a/erpnext/regional/india/e_invoice/einvoice.js
+++ b/erpnext/regional/india/e_invoice/einvoice.js
@@ -1,12 +1,13 @@
 erpnext.setup_einvoice_actions = (doctype) => {
 	frappe.ui.form.on(doctype, {
 		async refresh(frm) {
-			const einvoicing_enabled = await frappe.db.get_single_value("E Invoice Settings", "enable");
-			const supply_type = frm.doc.gst_category;
-			const valid_supply_type = ['Registered Regular', 'SEZ', 'Overseas', 'Deemed Export'].includes(supply_type);
-			const company_transaction = frm.doc.billing_address_gstin == frm.doc.company_gstin;
+			const res = await frappe.call({
+				method: 'erpnext.regional.india.e_invoice.utils.validate_eligibility',
+				args: { doc: frm.doc }
+			});
+			const invoice_eligible = res.message;
 
-			if (cint(einvoicing_enabled) == 0 || !valid_supply_type || company_transaction) return;
+			if (!invoice_eligible) return;
 
 			const { doctype, irn, irn_cancelled, ewaybill, eway_bill_cancelled, name, __unsaved } = frm.doc;
 
@@ -109,45 +110,25 @@
 			}
 
 			if (irn && ewaybill && !irn_cancelled && !eway_bill_cancelled) {
-				const fields = [
-					{
-						"label": "Reason",
-						"fieldname": "reason",
-						"fieldtype": "Select",
-						"reqd": 1,
-						"default": "1-Duplicate",
-						"options": ["1-Duplicate", "2-Data Entry Error", "3-Order Cancelled", "4-Other"]
-					},
-					{
-						"label": "Remark",
-						"fieldname": "remark",
-						"fieldtype": "Data",
-						"reqd": 1
-					}
-				];
 				const action = () => {
-					const d = new frappe.ui.Dialog({
-						title: __('Cancel E-Way Bill'),
-						fields: fields,
+					let message = __('Cancellation of e-way bill is currently not supported. ');
+					message += '<br><br>';
+					message += __('You must first use the portal to cancel the e-way bill and then update the cancelled status in the ERPNext system.');
+
+					frappe.msgprint({
+						title: __('Update E-Way Bill Cancelled Status?'),
+						message: message,
+						indicator: 'orange',
 						primary_action: function() {
-							const data = d.get_values();
 							frappe.call({
 								method: 'erpnext.regional.india.e_invoice.utils.cancel_eway_bill',
-								args: {
-									doctype,
-									docname: name,
-									eway_bill: ewaybill,
-									reason: data.reason.split('-')[0],
-									remark: data.remark
-								},
+								args: { doctype, docname: name },
 								freeze: true,
-								callback: () => frm.reload_doc() || d.hide(),
-								error: () => d.hide()
+								callback: () => frm.reload_doc()
 							});
 						},
-						primary_action_label: __('Submit')
+						primary_action_label: __('Yes')
 					});
-					d.show();
 				};
 				add_custom_button(__("Cancel E-Way Bill"), action);
 			}
diff --git a/erpnext/regional/india/e_invoice/utils.py b/erpnext/regional/india/e_invoice/utils.py
index 5f59d64..fb1f464 100644
--- a/erpnext/regional/india/e_invoice/utils.py
+++ b/erpnext/regional/india/e_invoice/utils.py
@@ -15,18 +15,43 @@
 import io
 from frappe import _, bold
 from pyqrcode import create as qrcreate
+from frappe.utils.background_jobs import enqueue
+from frappe.utils.scheduler import is_scheduler_inactive
+from frappe.core.page.background_jobs.background_jobs import get_info
 from frappe.integrations.utils import make_post_request, make_get_request
 from erpnext.regional.india.utils import get_gst_accounts, get_place_of_supply
-from frappe.utils.data import cstr, cint, format_date, flt, time_diff_in_seconds, now_datetime, add_to_date, get_link_to_form
+from frappe.utils.data import cstr, cint, format_date, flt, time_diff_in_seconds, now_datetime, add_to_date, get_link_to_form, getdate, time_diff_in_hours
 
-def validate_einvoice_fields(doc):
-	einvoicing_enabled = cint(frappe.db.get_value('E Invoice Settings', 'E Invoice Settings', 'enable'))
-	invalid_doctype = doc.doctype != 'Sales Invoice'
+@frappe.whitelist()
+def validate_eligibility(doc):
+	if isinstance(doc, six.string_types):
+		doc = json.loads(doc)
+
+	invalid_doctype = doc.get('doctype') != 'Sales Invoice'
+	if invalid_doctype:
+		return False
+
+	einvoicing_enabled = cint(frappe.db.get_single_value('E Invoice Settings', 'enable'))
+	if not einvoicing_enabled:
+		return False
+
+	einvoicing_eligible_from = frappe.db.get_single_value('E Invoice Settings', 'applicable_from') or '2021-04-01'
+	if getdate(doc.get('posting_date')) < getdate(einvoicing_eligible_from):
+		return False
+
 	invalid_supply_type = doc.get('gst_category') not in ['Registered Regular', 'SEZ', 'Overseas', 'Deemed Export']
 	company_transaction = doc.get('billing_address_gstin') == doc.get('company_gstin')
 	no_taxes_applied = not doc.get('taxes')
 
-	if not einvoicing_enabled or invalid_doctype or invalid_supply_type or company_transaction or no_taxes_applied:
+	if invalid_supply_type or company_transaction or no_taxes_applied:
+		return False
+
+	return True
+
+def validate_einvoice_fields(doc):
+	invoice_eligible = validate_eligibility(doc)
+
+	if not invoice_eligible:
 		return
 
 	if doc.docstatus == 0 and doc._action == 'save':
@@ -35,6 +60,8 @@
 		if len(doc.name) > 16:
 			raise_document_name_too_long_error()
 
+		doc.einvoice_status = 'Pending'
+
 	elif doc.docstatus == 1 and doc._action == 'submit' and not doc.irn:
 		frappe.throw(_('You must generate IRN before submitting the document.'), title=_('Missing IRN'))
 
@@ -76,6 +103,9 @@
 	))
 
 def get_doc_details(invoice):
+	if getdate(invoice.posting_date) < getdate('2021-01-01'):
+		frappe.throw(_('IRN generation is not allowed for invoices dated before 1st Jan 2021'), title=_('Not Allowed'))
+
 	invoice_type = 'CRN' if invoice.is_return else 'INV'
 
 	invoice_name = invoice.name
@@ -87,56 +117,39 @@
 		invoice_date=invoice_date
 	))
 
-def get_party_details(address_name, company_address=None, billing_address=None, shipping_address=None):
-	d = frappe.get_all('Address', filters={'name': address_name}, fields=['*'])[0]
-
-	if ((not d.gstin and not shipping_address)
-		or not d.city
-		or not d.pincode
-		or not d.address_title
-		or not d.address_line1
-		or not d.gst_state_number):
+def validate_address_fields(address, is_shipping_address):
+	if ((not address.gstin and not is_shipping_address)
+		or not address.city
+		or not address.pincode
+		or not address.address_title
+		or not address.address_line1
+		or not address.gst_state_number):
 
 		frappe.throw(
-			msg=_('Address lines, city, pincode, gstin is mandatory for address {}. Please set them and try again.').format(
-				get_link_to_form('Address', address_name)
-			),
+			msg=_('Address Lines, City, Pincode, GSTIN are mandatory for address {}. Please set them and try again.').format(address.name),
 			title=_('Missing Address Fields')
 		)
 
-	if d.gst_state_number == 97:
+def get_party_details(address_name, is_shipping_address=False):
+	addr = frappe.get_doc('Address', address_name)
+	
+	validate_address_fields(addr, is_shipping_address)
+
+	if addr.gst_state_number == 97:
 		# according to einvoice standard
-		pincode = 999999
+		addr.pincode = 999999
 
 	party_address_details = frappe._dict(dict(
-		legal_name=sanitize_for_json(d.address_title),
-		location=sanitize_for_json(d.city),
-		pincode=d.pincode,
-		state_code=d.gst_state_number,
-		address_line1=sanitize_for_json(d.address_line1),
-		address_line2=sanitize_for_json(d.address_line2)
+		legal_name=sanitize_for_json(addr.address_title),
+		location=sanitize_for_json(addr.city),
+		pincode=addr.pincode, gstin=addr.gstin,
+		state_code=addr.gst_state_number,
+		address_line1=sanitize_for_json(addr.address_line1),
+		address_line2=sanitize_for_json(addr.address_line2)
 	))
-	if d.gstin:
-		party_address_details.gstin = d.gstin
+
 	return party_address_details
 
-def get_gstin_details(gstin):
-	if not hasattr(frappe.local, 'gstin_cache'):
-		frappe.local.gstin_cache = {}
-
-	key = gstin
-	details = frappe.local.gstin_cache.get(key)
-	if details:
-		return details
-
-	details = frappe.cache().hget('gstin_cache', key)
-	if details:
-		frappe.local.gstin_cache[key] = details
-		return details
-
-	if not details:
-		return GSPConnector.get_gstin_details(gstin)
-
 def get_overseas_address_details(address_name):
 	address_title, address_line1, address_line2, city = frappe.db.get_value(
 		'Address', address_name, ['address_title', 'address_line1', 'address_line2', 'city']
@@ -212,7 +225,7 @@
 		is_applicable = t.tax_amount and t.account_head in gst_accounts_list
 		if is_applicable:
 			# this contains item wise tax rate & tax amount (incl. discount)
-			item_tax_detail = json.loads(t.item_wise_tax_detail).get(item.item_code)
+			item_tax_detail = json.loads(t.item_wise_tax_detail).get(item.item_code or item.item_name)
 
 			item_tax_rate = item_tax_detail[0]
 			# item tax amount excluding discount amount
@@ -230,6 +243,9 @@
 				if t.account_head in gst_accounts[f'{tax_type}_account']:
 					item.tax_rate += item_tax_rate
 					item[f'{tax_type}_amount'] += abs(item_tax_amount)
+		else:
+			# TODO: other charges per item
+			pass
 
 	return item
 
@@ -309,6 +325,10 @@
 	))
 
 def get_return_doc_reference(invoice):
+	if not invoice.return_against:
+		frappe.throw(_('For generating IRN, reference to the original invoice is mandatory for a credit note. Please set {} field to generate e-invoice.')
+			.format(frappe.bold('Return Against')), title=_('Missing Field'))
+
 	invoice_date = frappe.db.get_value('Sales Invoice', invoice.return_against, 'posting_date')
 	return frappe._dict(dict(
 		invoice_name=invoice.return_against, invoice_date=format_date(invoice_date, 'dd/mm/yyyy')
@@ -316,7 +336,11 @@
 
 def get_eway_bill_details(invoice):
 	if invoice.is_return:
-		frappe.throw(_('E-Way Bill cannot be generated for Credit Notes & Debit Notes'), title=_('E Invoice Validation Failed'))
+		frappe.throw(_('E-Way Bill cannot be generated for Credit Notes & Debit Notes. Please clear fields in the Transporter Section of the invoice.'),
+			title=_('Invalid Fields'))
+	
+	if not invoice.distance:
+		frappe.throw(_('Distance is mandatory for generating e-way bill for an e-invoice.'), title=_('Missing Field'))
 
 	mode_of_transport = { '': '', 'Road': '1', 'Air': '2', 'Rail': '3', 'Ship': '4' }
 	vehicle_type = { 'Regular': 'R', 'Over Dimensional Cargo (ODC)': 'O' }
@@ -334,9 +358,15 @@
 
 def validate_mandatory_fields(invoice):
 	if not invoice.company_address:
-		frappe.throw(_('Company Address is mandatory to fetch company GSTIN details.'), title=_('Missing Fields'))
+		frappe.throw(
+			_('Company Address is mandatory to fetch company GSTIN details. Please set Company Address and try again.'),
+			title=_('Missing Fields')
+		)
 	if not invoice.customer_address:
-		frappe.throw(_('Customer Address is mandatory to fetch customer GSTIN details.'), title=_('Missing Fields'))
+		frappe.throw(
+			_('Customer Address is mandatory to fetch customer GSTIN details. Please set Company Address and try again.'),
+			title=_('Missing Fields')
+		)
 	if not frappe.db.get_value('Address', invoice.company_address, 'gstin'):
 		frappe.throw(
 			_('GSTIN is mandatory to fetch company GSTIN details. Please enter GSTIN in selected company address.'),
@@ -348,6 +378,39 @@
 			title=_('Missing Fields')
 		)
 
+def validate_totals(einvoice):
+	item_list = einvoice['ItemList']
+	value_details = einvoice['ValDtls']
+
+	total_item_ass_value = 0
+	total_item_cgst_value = 0
+	total_item_sgst_value = 0
+	total_item_igst_value = 0
+	total_item_value = 0
+	for item in item_list:
+		total_item_ass_value += flt(item['AssAmt'])
+		total_item_cgst_value += flt(item['CgstAmt'])
+		total_item_sgst_value += flt(item['SgstAmt'])
+		total_item_igst_value += flt(item['IgstAmt'])
+		total_item_value += flt(item['TotItemVal'])
+
+		if abs(flt(item['AssAmt']) * flt(item['GstRt']) / 100) - (flt(item['CgstAmt']) + flt(item['SgstAmt']) + flt(item['IgstAmt'])) > 1:
+			frappe.throw(_('Row #{}: GST rate is invalid. Please remove tax rows with zero tax amount from taxes table.').format(item.idx))
+
+	if abs(flt(value_details['AssVal']) - total_item_ass_value) > 1:
+		frappe.throw(_('Total Taxable Value of the items is not equal to the Invoice Net Total. Please check item taxes / discounts for any correction.'))
+
+	if abs(flt(value_details['TotInvVal']) + flt(value_details['Discount']) - total_item_value) > 1:
+		frappe.throw(_('Total Value of the items is not equal to the Invoice Grand Total. Please check item taxes / discounts for any correction.'))
+
+	calculated_invoice_value = \
+			flt(value_details['AssVal']) + flt(value_details['CgstVal']) \
+			+ flt(value_details['SgstVal']) + flt(value_details['IgstVal']) \
+			+ flt(value_details['OthChrg']) - flt(value_details['Discount'])
+
+	if abs(flt(value_details['TotInvVal']) - calculated_invoice_value) > 1:
+		frappe.throw(_('Total Item Value + Taxes - Discount is not equal to the Invoice Grand Total. Please check taxes / discounts for any correction.'))
+
 def make_einvoice(invoice):
 	validate_mandatory_fields(invoice)
 
@@ -357,12 +420,12 @@
 	item_list = get_item_list(invoice)
 	doc_details = get_doc_details(invoice)
 	invoice_value_details = get_invoice_value_details(invoice)
-	seller_details = get_party_details(invoice.company_address, company_address=1)
+	seller_details = get_party_details(invoice.company_address)
 
 	if invoice.gst_category == 'Overseas':
 		buyer_details = get_overseas_address_details(invoice.customer_address)
 	else:
-		buyer_details = get_party_details(invoice.customer_address, billing_address=1)
+		buyer_details = get_party_details(invoice.customer_address)
 		place_of_supply = get_place_of_supply(invoice, invoice.doctype)
 		if place_of_supply:
 			place_of_supply = place_of_supply.split('-')[0]
@@ -370,20 +433,23 @@
 			place_of_supply = sanitize_for_json(invoice.billing_address_gstin)[:2]
 		buyer_details.update(dict(place_of_supply=place_of_supply))
 
+	seller_details.update(dict(legal_name=invoice.company))
+	buyer_details.update(dict(legal_name=invoice.customer_name or invoice.customer))
+
 	shipping_details = payment_details = prev_doc_details = eway_bill_details = frappe._dict({})
 	if invoice.shipping_address_name and invoice.customer_address != invoice.shipping_address_name:
 		if invoice.gst_category == 'Overseas':
 			shipping_details = get_overseas_address_details(invoice.shipping_address_name)
 		else:
-			shipping_details = get_party_details(invoice.shipping_address_name, shipping_address=1)
+			shipping_details = get_party_details(invoice.shipping_address_name, is_shipping_address=True)
 
 	if invoice.is_pos and invoice.base_paid_amount:
 		payment_details = get_payment_details(invoice)
 
-	if invoice.is_return and invoice.return_against:
+	if invoice.is_return:
 		prev_doc_details = get_return_doc_reference(invoice)
 
-	if invoice.transporter:
+	if invoice.transporter and flt(invoice.distance) and not invoice.is_return:
 		eway_bill_details = get_eway_bill_details(invoice)
 
 	# not yet implemented
@@ -396,18 +462,70 @@
 		period_details=period_details, prev_doc_details=prev_doc_details,
 		export_details=export_details, eway_bill_details=eway_bill_details
 	)
-	einvoice = safe_json_load(einvoice)
 
-	validations = json.loads(read_json('einv_validation'))
-	errors = validate_einvoice(validations, einvoice)
-	if errors:
-		message = "\n".join([
-			"E Invoice: ", json.dumps(einvoice, indent=4),
-			"-" * 50,
-			"Errors: ", json.dumps(errors, indent=4)
-		])
-		frappe.log_error(title="E Invoice Validation Failed", message=message)
-		frappe.throw(errors, title=_('E Invoice Validation Failed'), as_list=1)
+	try:
+		einvoice = safe_json_load(einvoice)
+		einvoice = santize_einvoice_fields(einvoice)
+		validate_totals(einvoice)
+
+	except Exception:
+		log_error(einvoice)
+		link_to_error_list = '<a href="List/Error Log/List?method=E Invoice Request Failed">Error Log</a>'
+		frappe.throw(
+			_('An error occurred while creating e-invoice for {}. Please check {} for more information.').format(
+				invoice.name, link_to_error_list),
+			title=_('E Invoice Creation Failed')
+		)
+
+	return einvoice
+
+def log_error(data=None):
+	if not isinstance(data, dict):
+		data = json.loads(data)
+
+	seperator = "--" * 50
+	err_tb = traceback.format_exc()
+	err_msg = str(sys.exc_info()[1])
+	data = json.dumps(data, indent=4)
+
+	message = "\n".join([
+		"Error", err_msg, seperator,
+		"Data:", data, seperator,
+		"Exception:", err_tb
+	])
+	frappe.log_error(title=_('E Invoice Request Failed'), message=message)
+
+def santize_einvoice_fields(einvoice):
+	int_fields = ["Pin","Distance","CrDay"]
+	float_fields = ["Qty","FreeQty","UnitPrice","TotAmt","Discount","PreTaxVal","AssAmt","GstRt","IgstAmt","CgstAmt","SgstAmt","CesRt","CesAmt","CesNonAdvlAmt","StateCesRt","StateCesAmt","StateCesNonAdvlAmt","OthChrg","TotItemVal","AssVal","CgstVal","SgstVal","IgstVal","CesVal","StCesVal","Discount","OthChrg","RndOffAmt","TotInvVal","TotInvValFc","PaidAmt","PaymtDue","ExpDuty",]
+	copy = einvoice.copy()
+	for key, value in copy.items():
+		if isinstance(value, list):
+			for idx, d in enumerate(value):
+				santized_dict = santize_einvoice_fields(d)
+				if santized_dict:
+					einvoice[key][idx] = santized_dict
+				else:
+					einvoice[key].pop(idx)
+
+			if not einvoice[key]:
+				einvoice.pop(key, None)
+
+		elif isinstance(value, dict):
+			santized_dict = santize_einvoice_fields(value)
+			if santized_dict:
+				einvoice[key] = santized_dict
+			else:
+				einvoice.pop(key, None)
+
+		elif not value or value == "None":
+			einvoice.pop(key, None)
+
+		elif key in float_fields:
+			einvoice[key] = flt(value, 2)
+
+		elif key in int_fields:
+			einvoice[key] = cint(value)
 
 	return einvoice
 
@@ -423,72 +541,22 @@
 		snippet = json_string[start:end]
 		frappe.throw(_("Error in input data. Please check for any special characters near following input: <br> {}").format(snippet))
 
-def validate_einvoice(validations, einvoice, errors=None):
-	if errors is None:
-		errors = []
-	for fieldname, field_validation in validations.items():
-		value = einvoice.get(fieldname, None)
-		if not value or value == "None":
-			# remove keys with empty values
-			einvoice.pop(fieldname, None)
-			continue
-
-		value_type = field_validation.get("type").lower()
-		if value_type in ['object', 'array']:
-			child_validations = field_validation.get('properties')
-
-			if isinstance(value, list):
-				for d in value:
-					validate_einvoice(child_validations, d, errors)
-					if not d:
-						# remove empty dicts
-						einvoice.pop(fieldname, None)
-			else:
-				validate_einvoice(child_validations, value, errors)
-				if not value:
-					# remove empty dicts
-					einvoice.pop(fieldname, None)
-			continue
-
-		# convert to int or str
-		if value_type == 'string':
-			einvoice[fieldname] = str(value)
-		elif value_type == 'number':
-			is_integer = '.' not in str(field_validation.get('maximum'))
-			precision = 3 if '.999' in str(field_validation.get('maximum')) else 2
-			einvoice[fieldname] = flt(value, precision) if not is_integer else cint(value)
-			value = einvoice[fieldname]
-
-		max_length = field_validation.get('maxLength')
-		minimum = flt(field_validation.get('minimum'))
-		maximum = flt(field_validation.get('maximum'))
-		pattern_str = field_validation.get('pattern')
-		pattern = re.compile(pattern_str or '')
-
-		label = field_validation.get('description') or fieldname
-
-		if value_type == 'string' and len(value) > max_length:
-			errors.append(_('{} should not exceed {} characters').format(label, max_length))
-		if value_type == 'number' and (value > maximum or value < minimum):
-			errors.append(_('{} {} should be between {} and {}').format(label, value, minimum, maximum))
-		if pattern_str and not pattern.match(value):
-			errors.append(field_validation.get('validationMsg'))
-
-	return errors
-
-class RequestFailed(Exception): pass
+class RequestFailed(Exception):
+	pass
+class CancellationNotAllowed(Exception):
+	pass
 
 class GSPConnector():
 	def __init__(self, doctype=None, docname=None):
-		self.e_invoice_settings = frappe.get_cached_doc('E Invoice Settings')
-		sandbox_mode = self.e_invoice_settings.sandbox_mode
+		self.doctype = doctype
+		self.docname = docname
 
-		self.invoice = frappe.get_cached_doc(doctype, docname) if doctype and docname else None
-		self.credentials = self.get_credentials()
+		self.set_invoice()
+		self.set_credentials()
 
 		# authenticate url is same for sandbox & live
 		self.authenticate_url = 'https://gsp.adaequare.com/gsp/authenticate?grant_type=token'
-		self.base_url = 'https://gsp.adaequare.com' if not sandbox_mode else 'https://gsp.adaequare.com/test'
+		self.base_url = 'https://gsp.adaequare.com' if not self.e_invoice_settings.sandbox_mode else 'https://gsp.adaequare.com/test'
 
 		self.cancel_irn_url = self.base_url + '/enriched/ei/api/invoice/cancel'
 		self.irn_details_url = self.base_url + '/enriched/ei/api/invoice/irn'
@@ -497,15 +565,26 @@
 		self.cancel_ewaybill_url = self.base_url + '/enriched/ewb/ewayapi?action=CANEWB'
 		self.generate_ewaybill_url = self.base_url + '/enriched/ei/api/ewaybill'
 
-	def get_credentials(self):
+	def set_invoice(self):
+		self.invoice = None
+		if self.doctype and self.docname:
+			self.invoice = frappe.get_cached_doc(self.doctype, self.docname)
+
+	def set_credentials(self):
+		self.e_invoice_settings = frappe.get_cached_doc('E Invoice Settings')
+
+		if not self.e_invoice_settings.enable:
+			frappe.throw(_("E-Invoicing is disabled. Please enable it from {} to generate e-invoices.").format(get_link_to_form("E Invoice Settings", "E Invoice Settings")))
+
 		if self.invoice:
 			gstin = self.get_seller_gstin()
-			if not self.e_invoice_settings.enable:
-				frappe.throw(_("E-Invoicing is disabled. Please enable it from {} to generate e-invoices.").format(get_link_to_form("E Invoice Settings", "E Invoice Settings")))
-			credentials = next(d for d in self.e_invoice_settings.credentials if d.gstin == gstin)
+			credentials_for_gstin = [d for d in self.e_invoice_settings.credentials if d.gstin == gstin]
+			if credentials_for_gstin:
+				self.credentials = credentials_for_gstin[0]
+			else:
+				frappe.throw(_('Cannot find e-invoicing credentials for selected Company GSTIN. Please check E-Invoice Settings'))
 		else:
-			credentials = self.e_invoice_settings.credentials[0] if self.e_invoice_settings.credentials else None
-		return credentials
+			self.credentials = self.e_invoice_settings.credentials[0] if self.e_invoice_settings.credentials else None
 
 	def get_seller_gstin(self):
 		gstin = self.invoice.company_gstin or frappe.db.get_value('Address', self.invoice.company_address, 'gstin')
@@ -556,7 +635,7 @@
 			self.e_invoice_settings.reload()
 
 		except Exception:
-			self.log_error(res)
+			log_error(res)
 			self.raise_error(True)
 
 	def get_headers(self):
@@ -578,14 +657,14 @@
 			if res.get('success'):
 				return res.get('result')
 			else:
-				self.log_error(res)
+				log_error(res)
 				raise RequestFailed
 
 		except RequestFailed:
 			self.raise_error()
 
 		except Exception:
-			self.log_error()
+			log_error()
 			self.raise_error(True)
 
 	@staticmethod
@@ -603,12 +682,13 @@
 		return details
 
 	def generate_irn(self):
-		headers = self.get_headers()
-		einvoice = make_einvoice(self.invoice)
-		data = json.dumps(einvoice, indent=4)
-
+		data = {}
 		try:
+			headers = self.get_headers()
+			einvoice = make_einvoice(self.invoice)
+			data = json.dumps(einvoice, indent=4)
 			res = self.make_request('post', self.generate_irn_url, headers, data)
+
 			if res.get('success'):
 				self.set_einvoice_data(res.get('result'))
 
@@ -628,12 +708,36 @@
 
 		except RequestFailed:
 			errors = self.sanitize_error_message(res.get('message'))
+			self.set_failed_status(errors=errors)
 			self.raise_error(errors=errors)
 
-		except Exception:
-			self.log_error(data)
+		except Exception as e:
+			self.set_failed_status(errors=str(e))
+			log_error(data)
 			self.raise_error(True)
 
+	@staticmethod
+	def bulk_generate_irn(invoices):
+		gsp_connector = GSPConnector()
+		gsp_connector.doctype = 'Sales Invoice'
+
+		failed = []
+
+		for invoice in invoices:
+			try:
+				gsp_connector.docname = invoice
+				gsp_connector.set_invoice()
+				gsp_connector.set_credentials()
+				gsp_connector.generate_irn()
+
+			except Exception as e:
+				failed.append({
+					'docname': invoice,
+					'message': str(e)
+				})
+
+		return failed
+
 	def get_irn_details(self, irn):
 		headers = self.get_headers()
 
@@ -650,21 +754,30 @@
 			self.raise_error(errors=errors)
 
 		except Exception:
-			self.log_error()
+			log_error()
 			self.raise_error(True)
 
 	def cancel_irn(self, irn, reason, remark):
-		headers = self.get_headers()
-		data = json.dumps({
-			'Irn': irn,
-			'Cnlrsn': reason,
-			'Cnlrem': remark
-		}, indent=4)
-
+		data, res = {}, {}
 		try:
+			# validate cancellation
+			if time_diff_in_hours(now_datetime(), self.invoice.ack_date) > 24:
+				frappe.throw(_('E-Invoice cannot be cancelled after 24 hours of IRN generation.'), title=_('Not Allowed'), exc=CancellationNotAllowed)
+			if not irn:
+				frappe.throw(_('IRN not found. You must generate IRN before cancelling.'), title=_('Not Allowed'), exc=CancellationNotAllowed)
+
+			headers = self.get_headers()
+			data = json.dumps({
+				'Irn': irn,
+				'Cnlrsn': reason,
+				'Cnlrem': remark
+			}, indent=4)
+
 			res = self.make_request('post', self.cancel_irn_url, headers, data)
-			if res.get('success'):
+			if res.get('success') or '9999' in res.get('message'):
 				self.invoice.irn_cancelled = 1
+				self.invoice.irn_cancel_date = res.get('result')['CancelDate'] if res.get('result') else ""
+				self.invoice.einvoice_status = 'Cancelled'
 				self.invoice.flags.updater_reference = {
 					'doctype': self.invoice.doctype,
 					'docname': self.invoice.name,
@@ -677,12 +790,41 @@
 
 		except RequestFailed:
 			errors = self.sanitize_error_message(res.get('message'))
+			self.set_failed_status(errors=errors)
 			self.raise_error(errors=errors)
 
-		except Exception:
-			self.log_error(data)
+		except CancellationNotAllowed as e:
+			self.set_failed_status(errors=str(e))
+			self.raise_error(errors=str(e))
+
+		except Exception as e:
+			self.set_failed_status(errors=str(e))
+			log_error(data)
 			self.raise_error(True)
 
+	@staticmethod
+	def bulk_cancel_irn(invoices, reason, remark):
+		gsp_connector = GSPConnector()
+		gsp_connector.doctype = 'Sales Invoice'
+
+		failed = []
+
+		for invoice in invoices:
+			try:
+				gsp_connector.docname = invoice
+				gsp_connector.set_invoice()
+				gsp_connector.set_credentials()
+				irn = gsp_connector.invoice.irn
+				gsp_connector.cancel_irn(irn, reason, remark)
+
+			except Exception as e:
+				failed.append({
+					'docname': invoice,
+					'message': str(e)
+				})
+
+		return failed
+
 	def generate_eway_bill(self, **kwargs):
 		args = frappe._dict(kwargs)
 
@@ -721,7 +863,7 @@
 			self.raise_error(errors=errors)
 
 		except Exception:
-			self.log_error(data)
+			log_error(data)
 			self.raise_error(True)
 
 	def cancel_eway_bill(self, eway_bill, reason, remark):
@@ -753,7 +895,7 @@
 			self.raise_error(errors=errors)
 
 		except Exception:
-			self.log_error(data)
+			log_error(data)
 			self.raise_error(True)
 
 	def sanitize_error_message(self, message):
@@ -768,6 +910,9 @@
 			]
 			then we trim down the message by looping over errors
 		'''
+		if not message:
+			return []
+
 		errors = re.findall(': [^:]+', message)
 		for idx, e in enumerate(errors):
 			# remove colons
@@ -779,22 +924,6 @@
 
 		return errors
 
-	def log_error(self, data={}):
-		if not isinstance(data, dict):
-			data = json.loads(data)
-
-		seperator = "--" * 50
-		err_tb = traceback.format_exc()
-		err_msg = str(sys.exc_info()[1])
-		data = json.dumps(data, indent=4)
-
-		message = "\n".join([
-			"Error", err_msg, seperator,
-			"Data:", data, seperator,
-			"Exception:", err_tb
-		])
-		frappe.log_error(title=_('E Invoice Request Failed'), message=message)
-
 	def raise_error(self, raise_exception=False, errors=[]):
 		title = _('E Invoice Request Failed')
 		if errors:
@@ -817,7 +946,10 @@
 		self.invoice.ack_no = res.get('AckNo')
 		self.invoice.ack_date = res.get('AckDt')
 		self.invoice.signed_einvoice = dec_signed_invoice
+		self.invoice.ack_no = res.get('AckNo')
+		self.invoice.ack_date = res.get('AckDt')
 		self.invoice.signed_qr_code = res.get('SignedQRCode')
+		self.invoice.einvoice_status = 'Generated'
 
 		self.attach_qrcode_image()
 
@@ -854,6 +986,17 @@
 		self.invoice.flags.ignore_validate = True
 		self.invoice.save()
 
+	def set_failed_status(self, errors=None):
+		frappe.db.rollback()
+		self.invoice.einvoice_status = 'Failed'
+		self.invoice.failure_description = self.get_failure_message(errors) if errors else ""
+		self.update_invoice()
+		frappe.db.commit()
+	
+	def get_failure_message(self, errors):
+		if isinstance(errors, list):
+			errors = ', '.join(errors)
+		return errors
 
 def sanitize_for_json(string):
 	"""Escape JSON specific characters from a string."""
@@ -883,5 +1026,114 @@
 
 @frappe.whitelist()
 def cancel_eway_bill(doctype, docname, eway_bill, reason, remark):
-	gsp_connector = GSPConnector(doctype, docname)
-	gsp_connector.cancel_eway_bill(eway_bill, reason, remark)
+	# TODO: uncomment when eway_bill api from Adequare is enabled
+	# gsp_connector = GSPConnector(doctype, docname)
+	# gsp_connector.cancel_eway_bill(eway_bill, reason, remark)
+
+	# update cancelled status only, to be able to cancel irn next
+	frappe.db.set_value(doctype, docname, 'eway_bill_cancelled', 1)
+
+@frappe.whitelist()
+def generate_einvoices(docnames):
+	docnames = json.loads(docnames) or []
+
+	if len(docnames) < 10:
+		failures = GSPConnector.bulk_generate_irn(docnames)
+		frappe.local.message_log = []
+
+		if failures:
+			show_bulk_action_failure_message(failures)
+
+		success = len(docnames) - len(failures)
+		frappe.msgprint(
+			_('{} e-invoices generated successfully').format(success),
+			title=_('Bulk E-Invoice Generation Complete')
+		)
+			
+	else:
+		enqueue_bulk_action(schedule_bulk_generate_irn, docnames=docnames)
+
+def schedule_bulk_generate_irn(docnames):
+	failures = GSPConnector.bulk_generate_irn(docnames)
+	frappe.local.message_log = []
+
+	frappe.publish_realtime("bulk_einvoice_generation_complete", {
+		"user": frappe.session.user,
+		"failures": failures,
+		"invoices": docnames
+	})
+
+def show_bulk_action_failure_message(failures):
+	for doc in failures:
+		docname = '<a href="sales-invoice/{0}">{0}</a>'.format(doc.get('docname'))
+		message = doc.get('message').replace("'", '"')
+		if message[0] == '[':
+			errors = json.loads(message)
+			error_list = ''.join(['<li>{}</li>'.format(err) for err in errors])
+			message = '''{} has following errors:<br>
+				<ul style="padding-left: 20px; padding-top: 5px">{}</ul>'''.format(docname, error_list)
+		else:
+			message = '{} - {}'.format(docname, message)
+
+		frappe.msgprint(
+			message,
+			title=_('Bulk E-Invoice Generation Complete'),
+			indicator='red'
+		)
+
+@frappe.whitelist()
+def cancel_irns(docnames, reason, remark):
+	docnames = json.loads(docnames) or []
+
+	if len(docnames) < 10:
+		failures = GSPConnector.bulk_cancel_irn(docnames, reason, remark)
+		frappe.local.message_log = []
+
+		if failures:
+			show_bulk_action_failure_message(failures)
+
+		success = len(docnames) - len(failures)
+		frappe.msgprint(
+			_('{} e-invoices cancelled successfully').format(success),
+			title=_('Bulk E-Invoice Cancellation Complete')
+		)
+	else:
+		enqueue_bulk_action(schedule_bulk_cancel_irn, docnames=docnames, reason=reason, remark=remark)
+
+def schedule_bulk_cancel_irn(docnames, reason, remark):
+	failures = GSPConnector.bulk_cancel_irn(docnames, reason, remark)
+	frappe.local.message_log = []
+
+	frappe.publish_realtime("bulk_einvoice_cancellation_complete", {
+		"user": frappe.session.user,
+		"failures": failures,
+		"invoices": docnames
+	})
+
+def enqueue_bulk_action(job, **kwargs):
+	check_scheduler_status()
+
+	enqueue(
+		job,
+		**kwargs,
+		queue="long",
+		timeout=10000,
+		event="processing_bulk_einvoice_action",
+		now=frappe.conf.developer_mode or frappe.flags.in_test,
+	)
+
+	if job == schedule_bulk_generate_irn:
+		msg = _('E-Invoices will be generated in a background process.')
+	else:
+		msg = _('E-Invoices will be cancelled in a background process.')
+
+	frappe.msgprint(msg, alert=1)
+
+def check_scheduler_status():
+	if is_scheduler_inactive() and not frappe.flags.in_test:
+		frappe.throw(_("Scheduler is inactive. Cannot enqueue job."), title=_("Scheduler Inactive"))
+
+def job_already_enqueued(job_name):
+	enqueued_jobs = [d.get("job_name") for d in get_info()]
+	if job_name in enqueued_jobs:
+		return True
\ No newline at end of file
diff --git a/erpnext/regional/india/setup.py b/erpnext/regional/india/setup.py
index bf0712f..ec58fd2 100644
--- a/erpnext/regional/india/setup.py
+++ b/erpnext/regional/india/setup.py
@@ -51,7 +51,7 @@
 
 def add_custom_roles_for_reports():
 	for report_name in ('GST Sales Register', 'GST Purchase Register',
-		'GST Itemised Sales Register', 'GST Itemised Purchase Register', 'Eway Bill'):
+		'GST Itemised Sales Register', 'GST Itemised Purchase Register', 'Eway Bill', 'E-Invoice Summary'):
 
 		if not frappe.db.get_value('Custom Role', dict(report=report_name)):
 			frappe.get_doc(dict(
@@ -418,21 +418,37 @@
 		dict(fieldname='irn', label='IRN', fieldtype='Data', read_only=1, insert_after='customer', no_copy=1, print_hide=1,
 			depends_on='eval:in_list(["Registered Regular", "SEZ", "Overseas", "Deemed Export"], doc.gst_category) && doc.irn_cancelled === 0'),
 
-		dict(fieldname='ack_no', label='Ack. No.', fieldtype='Data', read_only=1, hidden=1, insert_after='irn', no_copy=1, print_hide=1),
-
-		dict(fieldname='ack_date', label='Ack. Date', fieldtype='Data', read_only=1, hidden=1, insert_after='ack_no', no_copy=1, print_hide=1),
-
 		dict(fieldname='irn_cancelled', label='IRN Cancelled', fieldtype='Check', no_copy=1, print_hide=1,
 			depends_on='eval:(doc.irn_cancelled === 1)', read_only=1, allow_on_submit=1, insert_after='customer'),
 
 		dict(fieldname='eway_bill_cancelled', label='E-Way Bill Cancelled', fieldtype='Check', no_copy=1, print_hide=1,
 			depends_on='eval:(doc.eway_bill_cancelled === 1)', read_only=1, allow_on_submit=1, insert_after='customer'),
 
-		dict(fieldname='signed_einvoice', fieldtype='Code', options='JSON', hidden=1, no_copy=1, print_hide=1, read_only=1),
+		dict(fieldname='einvoice_section', label='E-Invoice Fields', fieldtype='Section Break', insert_after='gst_vehicle_type',
+			print_hide=1, hidden=1),
+		
+		dict(fieldname='ack_no', label='Ack. No.', fieldtype='Data', read_only=1, hidden=1, insert_after='einvoice_section',
+			no_copy=1, print_hide=1),
+		
+		dict(fieldname='ack_date', label='Ack. Date', fieldtype='Data', read_only=1, hidden=1, insert_after='ack_no', no_copy=1, print_hide=1),
 
-		dict(fieldname='signed_qr_code', fieldtype='Code', options='JSON', hidden=1, no_copy=1, print_hide=1, read_only=1),
+		dict(fieldname='irn_cancel_date', label='Cancel Date', fieldtype='Data', read_only=1, hidden=1, insert_after='ack_date', 
+			no_copy=1, print_hide=1),
 
-		dict(fieldname='qrcode_image', label='QRCode', fieldtype='Attach Image', hidden=1, no_copy=1, print_hide=1, read_only=1)
+		dict(fieldname='signed_einvoice', label='Signed E-Invoice', fieldtype='Code', options='JSON', hidden=1, insert_after='irn_cancel_date',
+			no_copy=1, print_hide=1, read_only=1),
+
+		dict(fieldname='signed_qr_code', label='Signed QRCode', fieldtype='Code', options='JSON', hidden=1, insert_after='signed_einvoice',
+			no_copy=1, print_hide=1, read_only=1),
+
+		dict(fieldname='qrcode_image', label='QRCode', fieldtype='Attach Image', hidden=1, insert_after='signed_qr_code',
+			no_copy=1, print_hide=1, read_only=1),
+
+		dict(fieldname='einvoice_status', label='E-Invoice Status', fieldtype='Select', insert_after='qrcode_image',
+			options='\nPending\nGenerated\nCancelled\nFailed', default=None, hidden=1, no_copy=1, print_hide=1, read_only=1),
+
+		dict(fieldname='failure_description', label='E-Invoice Failure Description', fieldtype='Code', options='JSON',
+			hidden=1, insert_after='einvoice_status', no_copy=1, print_hide=1, read_only=1)
 	]
 
 	custom_fields = {
diff --git a/erpnext/regional/india/utils.py b/erpnext/regional/india/utils.py
index 082a32f..7709ddf 100644
--- a/erpnext/regional/india/utils.py
+++ b/erpnext/regional/india/utils.py
@@ -41,24 +41,25 @@
 		return
 
 	if len(doc.gstin) != 15:
-		frappe.throw(_("Invalid GSTIN! A GSTIN must have 15 characters."))
+		frappe.throw(_("A GSTIN must have 15 characters."), title=_("Invalid GSTIN"))
 
 	if gst_category and gst_category == 'UIN Holders':
 		if not GSTIN_UIN_FORMAT.match(doc.gstin):
-			frappe.throw(_("Invalid GSTIN! The input you've entered doesn't match the GSTIN format for UIN Holders or Non-Resident OIDAR Service Providers"))
+			frappe.throw(_("The input you've entered doesn't match the GSTIN format for UIN Holders or Non-Resident OIDAR Service Providers"),
+				title=_("Invalid GSTIN"))
 	else:
 		if not GSTIN_FORMAT.match(doc.gstin):
-			frappe.throw(_("Invalid GSTIN! The input you've entered doesn't match the format of GSTIN."))
+			frappe.throw(_("The input you've entered doesn't match the format of GSTIN."), title=_("Invalid GSTIN"))
 
 		validate_gstin_check_digit(doc.gstin)
 		set_gst_state_and_state_number(doc)
 
 		if not doc.gst_state:
-			frappe.throw(_("Please Enter GST state"))
+			frappe.throw(_("Please enter GST state"), title=_("Invalid State"))
 
 		if doc.gst_state_number != doc.gstin[:2]:
-			frappe.throw(_("Invalid GSTIN! First 2 digits of GSTIN should match with State number {0}.")
-				.format(doc.gst_state_number))
+			frappe.throw(_("First 2 digits of GSTIN should match with State number {0}.")
+				.format(doc.gst_state_number), title=_("Invalid GSTIN"))
 
 def validate_pan_for_india(doc, method):
 	if doc.get('country') != 'India' or not doc.pan:
diff --git a/erpnext/regional/report/e_invoice_summary/__init__.py b/erpnext/regional/report/e_invoice_summary/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/erpnext/regional/report/e_invoice_summary/__init__.py
diff --git a/erpnext/regional/report/e_invoice_summary/e_invoice_summary.js b/erpnext/regional/report/e_invoice_summary/e_invoice_summary.js
new file mode 100644
index 0000000..4713217
--- /dev/null
+++ b/erpnext/regional/report/e_invoice_summary/e_invoice_summary.js
@@ -0,0 +1,55 @@
+// Copyright (c) 2016, Frappe Technologies Pvt. Ltd. and contributors
+// For license information, please see license.txt
+/* eslint-disable */
+
+frappe.query_reports["E-Invoice Summary"] = {
+	"filters": [
+		{
+			"fieldtype": "Link",
+			"options": "Company",
+			"reqd": 1,
+			"fieldname": "company",
+			"label": __("Company"),
+			"default": frappe.defaults.get_user_default("Company"),
+		},
+		{
+			"fieldtype": "Link",
+			"options": "Customer",
+			"fieldname": "customer",
+			"label": __("Customer")
+		},
+		{
+			"fieldtype": "Date",
+			"reqd": 1,
+			"fieldname": "from_date",
+			"label": __("From Date"),
+			"default": frappe.datetime.add_months(frappe.datetime.get_today(), -1),
+		},
+		{
+			"fieldtype": "Date",
+			"reqd": 1,
+			"fieldname": "to_date",
+			"label": __("To Date"),
+			"default": frappe.datetime.get_today(),
+		},
+		{
+			"fieldtype": "Select",
+			"fieldname": "status",
+			"label": __("Status"),
+			"options": "\nPending\nGenerated\nCancelled\nFailed"
+		}
+	],
+
+	"formatter": function (value, row, column, data, default_formatter) {
+		value = default_formatter(value, row, column, data);
+
+		if (column.fieldname == "einvoice_status" && value) {
+			if (value == 'Pending') value = `<span class="bold" style="color: var(--text-on-orange)">${value}</span>`;
+			else if (value == 'Generated') value = `<span class="bold" style="color: var(--text-on-green)">${value}</span>`;
+			else if (value == 'Cancelled') value = `<span class="bold" style="color: var(--text-on-red)">${value}</span>`;
+			else if (value == 'Failed') value = `<span class="bold"  style="color: var(--text-on-red)">${value}</span>`;
+		}
+
+		return value;
+	}
+};
diff --git a/erpnext/regional/report/e_invoice_summary/e_invoice_summary.json b/erpnext/regional/report/e_invoice_summary/e_invoice_summary.json
new file mode 100644
index 0000000..4deb073
--- /dev/null
+++ b/erpnext/regional/report/e_invoice_summary/e_invoice_summary.json
@@ -0,0 +1,28 @@
+{
+ "add_total_row": 0,
+ "columns": [],
+ "creation": "2021-03-12 11:23:37.312294",
+ "disable_prepared_report": 0,
+ "disabled": 0,
+ "docstatus": 0,
+ "doctype": "Report",
+ "filters": [],
+ "idx": 0,
+ "is_standard": "Yes",
+ "json": "{}",
+ "letter_head": "Logo",
+ "modified": "2021-03-12 12:36:48.689413",
+ "modified_by": "Administrator",
+ "module": "Regional",
+ "name": "E-Invoice Summary",
+ "owner": "Administrator",
+ "prepared_report": 0,
+ "ref_doctype": "Sales Invoice",
+ "report_name": "E-Invoice Summary",
+ "report_type": "Script Report",
+ "roles": [
+  {
+   "role": "Administrator"
+  }
+ ]
+}
\ No newline at end of file
diff --git a/erpnext/regional/report/e_invoice_summary/e_invoice_summary.py b/erpnext/regional/report/e_invoice_summary/e_invoice_summary.py
new file mode 100644
index 0000000..47acf29
--- /dev/null
+++ b/erpnext/regional/report/e_invoice_summary/e_invoice_summary.py
@@ -0,0 +1,106 @@
+# Copyright (c) 2013, Frappe Technologies Pvt. Ltd. and contributors
+# For license information, please see license.txt
+
+from __future__ import unicode_literals
+import frappe
+from frappe import _
+
+def execute(filters=None):
+	validate_filters(filters)
+
+	columns = get_columns()
+	data = get_data(filters)
+
+	return columns, data
+
+def validate_filters(filters={}):
+	filters = frappe._dict(filters)
+
+	if not filters.company:
+		frappe.throw(_('{} is mandatory for generating E-Invoice Summary Report').format(_('Company')), title=_('Invalid Filter'))
+	if filters.company:
+		# validate if company has e-invoicing enabled
+		pass
+	if not filters.from_date or not filters.to_date:
+		frappe.throw(_('From Date & To Date is mandatory for generating E-Invoice Summary Report'), title=_('Invalid Filter'))
+	if filters.from_date > filters.to_date:
+		frappe.throw(_('From Date must be before To Date'), title=_('Invalid Filter'))
+
+def get_data(filters={}):
+	query_filters = {
+		'posting_date': ['between', [filters.from_date, filters.to_date]],
+		'einvoice_status': ['is', 'set'],
+		'company': filters.company
+	}
+	if filters.customer:
+		query_filters['customer'] = filters.customer
+	if filters.status:
+		query_filters['einvoice_status'] = filters.status
+
+	data = frappe.get_all(
+		'Sales Invoice',
+		filters=query_filters,
+		fields=[d.get('fieldname') for d in get_columns()]
+	)
+
+	return data
+
+def get_columns():
+	return [
+		{
+			"fieldtype": "Date",
+			"fieldname": "posting_date",
+			"label": _("Posting Date"),
+			"width": 0
+		},
+		{
+			"fieldtype": "Link", 
+			"fieldname": "name", 
+			"label": _("Sales Invoice"),
+			"options": "Sales Invoice",
+			"width": 140
+		},
+		{ 
+			"fieldtype": "Data", 
+			"fieldname": "einvoice_status", 
+			"label": _("Status"), 
+			"width": 100
+		},
+		{ 
+			"fieldtype": "Link",
+			"fieldname": "customer",
+			"options": "Customer",
+			"label": _("Customer")
+		},
+		{ 
+			"fieldtype": "Check",
+			"fieldname": "is_return",
+			"label": _("Is Return"),
+			"width": 85
+		},
+		{
+			"fieldtype": "Data", 
+			"fieldname": "ack_no", 
+			"label": "Ack. No.", 
+			"width": 145
+		},
+		{ 
+			"fieldtype": "Data", 
+			"fieldname": "ack_date", 
+			"label": "Ack. Date", 
+			"width": 165
+		},
+		{
+			"fieldtype": "Data", 
+			"fieldname": "irn", 
+			"label": _("IRN No."),
+			"width": 250
+		},
+		{
+			"fieldtype": "Currency",
+			"options": "Company:company:default_currency", 
+			"fieldname": "base_grand_total", 
+			"label": _("Grand Total"),
+			"width": 120
+		}
+	]
\ No newline at end of file