There is nothing you need to do with this time. Eventually the IRS records will catch up with reality and your payment will be reconciled with your return. Right now the IRS is busy completing returns with refunds on them so returns with balance dues are on the very back burner like they have been the past couple of years. So all you can do is just wait and be patient. If for an odd reason you do get a balance two letter simply respond with proof of payment and that should be the end of the story.
