Process a negative cash receipt against the prepayment.

1. Open Accounts Receivable, Main, Cash Receipts Entry.
2. Select the correct bank code and the next deposit number.
3. Enter the deposit amount as a negative amount. This is the same amount as the prepayment, but with a negative.
4. Select the Customer and enter anything for the check number.
5. Enter the same negative dollar amount into Amount Received.
6. Click the Lines tab, then select the prepayment invoice.
7. Click Accept.

Reverse a prepayment applied to an invoice in Accounts Receivable