updating vendor balances on old tax agency vendor records

Hello,

When we switched to using Avalara a few years ago the balances on the tax agency vendor records got messed up. We should only have the Avalara account that has a balance, but there are 3 others that somehow didn't get cleared out before inactivating the old tax codes. Is there a way to correct these balances? I basically want to move the balances that are remaining on the old vendor records in error to the Avalara record, without them coming up as an other tax payable (which happens when I try to do a journal entry). 

I have also noticed that the balance that comes up when I hit "pay sales tax" is not what I would expect it to be. It seems like that amount should match the unpaid tax total I get when running a sales tax analysis report. Is that correct?