Merge pull request #15882 from Zlash65/fixtds

[Minor] TDS not calculated properly fix

erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py

@@ -61,11 +61,11 @@ class PurchaseInvoice(BuyingController):
 
 		self.validate_posting_time()
 
+		super(PurchaseInvoice, self).validate()
+
 		# apply tax withholding only if checked and applicable
 		self.set_tax_withholding()
 
-		super(PurchaseInvoice, self).validate()
-
 		if not self.is_return:
 			self.po_required()
 			self.pr_required()
@@ -839,6 +839,9 @@ class PurchaseInvoice(BuyingController):
 		if not accounts or tax_withholding_details.get("account_head") not in accounts:
 			self.append("taxes", tax_withholding_details)
 
+		# calculate totals again after applying TDS
+		self.calculate_taxes_and_totals()
+
 @frappe.whitelist()
 def make_debit_note(source_name, target_doc=None):
 	from erpnext.controllers.sales_and_purchase_return import make_return_doc