When you need to update an unpaid invoice, you can apply a journal entry credit to that invoice.
First, create a journal entry using Accounts Receivable as the associated account, and select the customer's name from the Name column.
Then, apply that journal entry as a credit to your customer's unpaid invoice.
- Select + New.
- Select Receive payment.
- Choose a customer.
- Under Outstanding Transactions, select the invoice.
- Under Credits, select the journal entry to apply it as a credit.
- Select Save and close.