fix: set party_account_currency for pos_invoice returns

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -4304,6 +4304,30 @@ def test_total_billed_amount(self):
 		doc = frappe.get_doc("Project", project.name)
 		self.assertEqual(doc.total_billed_amount, si.grand_total)
 
+	def test_pos_returns_with_party_account_currency(self):
+		from erpnext.accounts.doctype.sales_invoice.sales_invoice import make_sales_return
+
+		pos_profile = make_pos_profile()
+		pos_profile.payments = []
+		pos_profile.append("payments", {"default": 1, "mode_of_payment": "Cash"})
+		pos_profile.save()
+
+		pos = create_sales_invoice(
+			customer="_Test Customer USD",
+			currency="USD",
+			conversion_rate=86.595000000,
+			qty=2,
+			do_not_save=True,
+		)
+		pos.is_pos = 1
+		pos.pos_profile = pos_profile.name
+		pos.debit_to = "_Test Receivable USD - _TC"
+		pos.append("payments", {"mode_of_payment": "Cash", "account": "_Test Bank - _TC", "amount": 20.35})
+		pos.save().submit()
+
+		pos_return = make_sales_return(pos.name)
+		self.assertEqual(abs(pos_return.payments[0].amount), pos.payments[0].amount)
+
 
 def set_advance_flag(company, flag, default_account):
 	frappe.db.set_value(

erpnext/controllers/sales_and_purchase_return.py

@@ -370,6 +370,8 @@ def set_missing_values(source, target):
 		if doc.get("is_return"):
 			if doc.doctype == "Sales Invoice" or doc.doctype == "POS Invoice":
 				doc.consolidated_invoice = ""
+				# no copy enabled for party_account_currency
+				doc.party_account_currency = source.party_account_currency
 				doc.set("payments", [])
 				doc.update_billed_amount_in_delivery_note = True
 				for data in source.payments: