Typically you would not record a refund to the bank directly when you are reporting and posting the remittance as it has not been received yet (and won't be for a while unless you normally get refunds).  I would post it to a clearing account assuming I was using the general journal.  However, because we don't know how you have already entered it, I can't say for sure if you should change it or add another entry.

Typically you would add a line to your general journal entry to record the revenue to the Interest Earned account (or account of a similar name) as you move the refund amount from a clearing account to the bank once it is received.

One other option would be to post the difference only and do the math on the bank rec if you didn't use a clearing account.

Thanks! adding a line in the GJ was what was needed