I have the same question and the other person replying to you has no clue. It says it will be applied automatically but Turbo Tax seems unaware or unable to allow it to be entered. I also have the letter and owe money. My concern is that I pay Turbo Tax to file my Missouri state tax because I owe, MDOR credits me back and I actually end up with a refund but somehow it all gets tangled up and I lose out on fees and service charges because Turbo Tax isn't keeping up with MDOR. If I could just enter the credit amount from my letter, I would be getting a refund and my tax return should be handled as a refund, not an owed amount, credit then refund (which seems fraught with peril).
