I found your question after I asked the same question. It doesn't look like you've received the answer you're looking for, so I will tell you what I was told:
Since it's the MDoR that is issuing the credit, the extra amount that will be retroactively refunded will not be reflected on TurboTax, and there is no place to put it on TurboTax. The MDoR will just add the amount listed on your letter to your 2022 state refund. (Also, no need to amend previous years.)
My question and the answer I received.
