I am not quite following but if there is still a balance showing in the customer subledger, just write it off back against AR.  Go into the Receive Money screen, select the customer and check off the transaction, then go to the Apply to Rev tab and enter the amount as a negative and edit the GL account in the row.  If you don't see that go to Options/Global and uncheck the Hide GL Account in Accounts Receivable on the first tab.  [email protected] 

THANK YOU!  THAT WAS THE SOLUTION!! SO THANKFUL FOR YOUR HELP!!