If they are both for the same amount, just go into Receive Money, enter the customer ID, and check the Pay box for both of them. Since the credit and invoice offset each other the Receipt Amount should be zero.

Thanks for the reply!

Unfortunately, the credit is not showing up on the 'Receive Money' window.  Only the Invoice is shown.  Any other suggestions?

If the credit memo shows up on the aged receivbles report but not in the Receive Money window, it's most likely because the credit memo was never assigned a credit memo/invoice number. Since it's from a closed year you can't just edit the transaction to give it a number. You'll have to print the credit memo and let the system assign the number.

Go to the Reports & Forms menu > Forms > Credit Memos. Select the format you want to print with and click the Preview & Print button. Then just follow the prompts select a starting CM number and print it. There will be no way to undo this since it's in a closed year (not that you would want to).

Once it has been printed the credit memo should show up in Receive Money.

You rock! Thank you so much!  This has been driving us in the Accounting Department crazy for way to long!