fix: round off tax withholding amount (#45271)

(cherry picked from commit ada272a29b)

erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py

@@ -156,6 +156,9 @@ def get_party_tax_withholding_details(inv, tax_withholding_category=None):
 		}
 	)
 
+	if cint(tax_details.round_off_tax_amount):
+		inv.round_off_applicable_accounts_for_tax_withholding = tax_details.account_head
+
 	if inv.doctype == "Purchase Invoice":
 		return tax_row, tax_deducted_on_advances, voucher_wise_amount
 	else:

erpnext/controllers/taxes_and_totals.py

@@ -30,6 +30,11 @@ class calculate_taxes_and_totals:
 			"Accounts Settings", "round_row_wise_tax"
 		)
 
+		if doc.get("round_off_applicable_accounts_for_tax_withholding"):
+			frappe.flags.round_off_applicable_accounts.append(
+				doc.round_off_applicable_accounts_for_tax_withholding
+			)
+
 		self._items = self.filter_rows() if self.doc.doctype == "Quotation" else self.doc.get("items")
 
 		get_round_off_applicable_accounts(self.doc.company, frappe.flags.round_off_applicable_accounts)