Refunding overpaid amount in QuickBooks and BQE CORE

In QuickBooks, user billed the client for an incorrect amount. The client paid the invoice, but was refunded the amount overpaid. How can this be done in BQE CORE?

You can invoice the client the same amount, then issue a credit memo, and cut a check for that amount. If you already have the check number, there is no need to print it in CORE.