You can open a closed invoice for various reasons such as your guest requested you to refund the amount or requested you to cancel the cash payment and accept the payment through credit or debit card.
Note: You cannot edit or refund the cashback amount for closed invoices if the payment was processed through online cards.
Click Reopen next to the invoice.
The Invoice-Reopen window appears.
3. Enter the Username, Password, Comments, and click OK.
The invoice is reopened and is available to edit or remove transactions
such as payments, services, or products.