Applying a credit to a sales order for credit card customer

SOLVED

Hi there!

We have a credit card customer who had a credit on their account.  The next time they placed an order, we wanted to apply the open credit before we ran their card through Sales Order Entry.  We couldn't figure out how to do it, so we did a work around.  But I'd really like to know how to do it the proper way, as it has come up before, and most likely will again.

Thanks for any advice!