For refunding cash sales, please follow these steps:
Voiding Transactions
Use the Void Transaction function.
You may activate the Keep Deleted Bills option in the Administrative Tools to retain records of voided bills.
Voided transactions can still be posted and validated.
Issuing refunds
As the Refund Note feature is not yet available, please use a standalone credit note without linking it to any bills.
In the item description or credit note description, clearly state that it is a refund for a cash bill and include the relevant reference number.
Compliance Note
LHDN accepts credit notes that are not linked to any invoice UUID, so this method complies with current requirements.