For the record, this approach ended up working for me too. But jeez, what a pain to half to re-download TurboTax 2021 (because I now have a new computer; thankfully Amazon kept my software purchase in their library along with the activation code for reinstalling it). Then you have to install it, then you have to manually open the .tax2021 file, go to view forms, and view form 6251. I noticed that this year's (2022) saved .pdf also doesn't include form 6251 when you save your tax forms to your computer, so I'm doing that manually for this year's taxes to save myself some grief come next year.
