Merge pull request #32526 from frappe/mergify/bp/version-13/pr-32523

fix: Tax withholding related fixes (backport #32522) (backport #32523)

erpnext/accounts/doctype/purchase_invoice/purchase_invoice.json

@@ -1428,6 +1428,7 @@
    "fieldname": "tax_withheld_vouchers",
    "fieldtype": "Table",
    "label": "Tax Withheld Vouchers",
+   "no_copy": 1,
    "options": "Tax Withheld Vouchers",
    "read_only": 1
   }
@@ -1436,7 +1437,7 @@
  "idx": 204,
  "is_submittable": 1,
  "links": [],
- "modified": "2022-09-13 23:39:54.525037",
+ "modified": "2022-10-07 14:19:14.214157",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Purchase Invoice",
@@ -1500,4 +1501,4 @@
  "timeline_field": "supplier",
  "title_field": "title",
  "track_changes": 1
-}
+}

erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py

@@ -240,6 +240,9 @@ def get_tax_amount(party_type, parties, inv, tax_details, posting_date, pan_no=N
 				)
 			else:
 				tax_amount = net_total * tax_details.rate / 100 if net_total > 0 else 0
+
+			# once tds is deducted, not need to add vouchers in the invoice
+			voucher_wise_amount = {}
 		else:
 			tax_amount = get_tds_amount(ldc, parties, inv, tax_details, tax_deducted, vouchers)
 
@@ -419,7 +422,10 @@ def get_tds_amount(ldc, parties, inv, tax_details, tax_deducted, vouchers):
 		):
 			# Get net total again as TDS is calculated on net total
 			# Grand is used to just check for threshold breach
-			net_total = frappe.db.get_value("Purchase Invoice", invoice_filters, "sum(net_total)") or 0.0
+			net_total = 0
+			if vouchers:
+				net_total = frappe.db.get_value("Purchase Invoice", invoice_filters, "sum(net_total)")
+
 			net_total += inv.net_total
 			supp_credit_amt = net_total - cumulative_threshold