Merge pull request #45007 from frappe/mergify/bp/version-14-hotfix/pr…

…-44884

fix: update item_tax_rate in backend (backport #44884)

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -36,6 +36,7 @@
 from erpnext.stock.doctype.stock_reconciliation.test_stock_reconciliation import (
 	create_stock_reconciliation,
 )
+from erpnext.stock.get_item_details import get_item_tax_map
 from erpnext.stock.utils import get_incoming_rate, get_stock_balance
 
 
@@ -2817,13 +2818,26 @@ def test_item_tax_net_range(self):
 		item.save()
 
 		sales_invoice = create_sales_invoice(item="T Shirt", rate=700, do_not_submit=True)
+		item_tax_map = get_item_tax_map(
+			company=sales_invoice.company,
+			item_tax_template=sales_invoice.items[0].item_tax_template,
+		)
+
 		self.assertEqual(sales_invoice.items[0].item_tax_template, "_Test Account Excise Duty @ 12 - _TC")
+		self.assertEqual(sales_invoice.items[0].item_tax_rate, item_tax_map)
 
 		# Apply discount
 		sales_invoice.apply_discount_on = "Net Total"
 		sales_invoice.discount_amount = 300
 		sales_invoice.save()
+
+		item_tax_map = get_item_tax_map(
+			company=sales_invoice.company,
+			item_tax_template=sales_invoice.items[0].item_tax_template,
+		)
+
 		self.assertEqual(sales_invoice.items[0].item_tax_template, "_Test Account Excise Duty @ 10 - _TC")
+		self.assertEqual(sales_invoice.items[0].item_tax_rate, item_tax_map)
 
 	@change_settings("Selling Settings", {"enable_discount_accounting": 1})
 	def test_sales_invoice_with_discount_accounting_enabled(self):