refactor: post ledger entries based on toggle

erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py

@@ -843,7 +843,9 @@ def make_supplier_gl_entry(self, gl_entries):
 						"credit_in_account_currency": base_grand_total
 						if self.party_account_currency == self.company_currency
 						else grand_total,
-						"against_voucher": self.name,
+						"against_voucher": self.name
+						if self.is_return and self.return_against and self.update_outstanding_for_self
+						else self.return_against,
 						"against_voucher_type": self.doctype,
 						"project": self.project,
 						"cost_center": self.cost_center,