fix: reflect in-invoice receivable settlements in Sales Register ledger view

(cherry picked from commit 40c356d166)

erpnext/accounts/report/sales_register/sales_register.py

@@ -160,7 +160,8 @@ def _execute(filters, additional_table_columns=None):
 			row.update(
 				{
 					"debit": inv.base_grand_total,
-					"credit": 0.0,
+					# credits the invoice itself posts to the receivable (mirrors its GL)
+					"credit": get_in_invoice_receivable_credit(inv),
 					"outstanding_amount": flt(
 						(inv.outstanding_amount * (inv.conversion_rate or 1)), outstanding_precision
 					),
@@ -181,6 +182,14 @@ def _execute(filters, additional_table_columns=None):
 	return columns, res, None, None, None, include_payments
 
 
+def get_in_invoice_receivable_credit(inv):
+	# amount the invoice settles against its own receivable, matching the invoice's GL entries
+	credit = flt(inv.loyalty_amount)  # loyalty redemption, POS or not
+	if inv.is_pos:  # POS payments and write-off credit the receivable only on POS invoices
+		credit += flt(inv.base_paid_amount) - flt(inv.base_change_amount) + flt(inv.base_write_off_amount)
+	return credit
+
+
 def get_columns(invoice_list, additional_table_columns, include_payments=False):
 	"""return columns based on filters"""
 	columns = [
@@ -447,6 +456,11 @@ def get_invoices(filters, additional_query_columns):
 			si.base_net_total,
 			si.base_grand_total,
 			si.base_rounded_total,
+			si.is_pos,
+			si.base_paid_amount,
+			si.base_change_amount,
+			si.base_write_off_amount,
+			si.loyalty_amount,
 			si.outstanding_amount,
 			si.is_internal_customer,
 			si.represents_company,