Not sure why 2022 generated the Schedule D AMT and 2021 did not, but I had the same issue. TT was asking for information from a 2021 Schedule D AMT that was never generated. After much head scratching, I went back into TurboTax 2021 program (had to shutdown 2023 version - won't run both at the same time) and asked it for the form and it generated it for me. I was able to pull the info requested and was on my way again.
BTW - the AMT forms/worksheets are generated to determine whether or not you owe AMT (Alternative Minimum Tax). Most do not owe AMT, but the determination is necessary.
