fix(accounts): ask for incoming rate on standalone POS returns

A standalone POS return had no field for the incoming rate. Without stock
history in the warehouse, the consolidated credit note could not get a rate
and the POS Closing Entry failed. POS Invoice Item now has the field, the rate
is checked when the return is saved, and consolidation carries it over.

erpnext/accounts/doctype/pos_invoice_item/pos_invoice_item.json

@@ -84,6 +84,7 @@
   "serial_and_batch_bundle",
   "use_serial_batch_fields",
   "col_break5",
+  "incoming_rate",
   "allow_zero_valuation_rate",
   "item_tax_rate",
   "actual_batch_qty",
@@ -644,6 +645,16 @@
    "fieldname": "col_break5",
    "fieldtype": "Column Break"
   },
+  {
+   "depends_on": "eval:parent.is_return && !parent.return_against",
+   "fieldname": "incoming_rate",
+   "fieldtype": "Currency",
+   "label": "Incoming Rate (Costing)",
+   "no_copy": 1,
+   "non_negative": 1,
+   "options": "Company:company:default_currency",
+   "print_hide": 1
+  },
   {
    "default": "0",
    "fieldname": "allow_zero_valuation_rate",
@@ -871,7 +882,7 @@
  ],
  "istable": 1,
  "links": [],
- "modified": "2026-04-20 16:16:12.322024",
+ "modified": "2026-10-28 12:00:00.000000",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "POS Invoice Item",

erpnext/accounts/doctype/pos_invoice_item/pos_invoice_item.py

@@ -48,6 +48,7 @@ class POSInvoiceItem(Document):
 		has_item_scanned: DF.Check
 		image: DF.Attach | None
 		income_account: DF.Link
+		incoming_rate: DF.Currency
 		is_fixed_asset: DF.Check
 		is_free_item: DF.Check
 		item_code: DF.Link | None

erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py

@@ -237,7 +237,11 @@ class POSInvoiceMergeLog(Document):
 				item.amount = item.net_amount
 				item.base_amount = item.base_net_amount
 				item.price_list_rate = 0
-				si_item = map_child_doc(item, invoice, {"doctype": "Sales Invoice Item"})
+				si_item = map_child_doc(
+					item,
+					invoice,
+					{"doctype": "Sales Invoice Item", "field_map": {"incoming_rate": "incoming_rate"}},
+				)
 				si_item.pos_invoice = doc.name
 				si_item.pos_invoice_item = item.name
 				if doc.is_return:

erpnext/controllers/selling_controller.py

@@ -511,7 +511,11 @@ class SellingController(StockController):
 				):
 					d.incoming_rate = 0
 
-		if self.doctype not in ("Delivery Note", "Sales Invoice"):
+		is_standalone = self.get("is_return") and not self.get("return_against")
+
+		if self.doctype not in ("Delivery Note", "Sales Invoice") and not (
+			self.doctype == "POS Invoice" and is_standalone
+		):
 			return
 
 		if self.doctype == "Sales Invoice" and not self.update_stock and not self.is_internal_transfer():
@@ -526,8 +530,6 @@ class SellingController(StockController):
 			"Selling Settings", "set_zero_rate_for_expired_batch"
 		)
 
-		is_standalone = self.is_return and not self.return_against
-
 		old_doc = self.get_doc_before_save()
 		items = self.get("items") + (self.get("packed_items") or [])
 		for d in items: