Thank you. It seems I shouldn't even have had a 6251 after all. I noticed my 2019 return had the 6251 worksheet while 2020 did not (exercised ISOs in each year, but no AMT was due) but seems neither had the actual 6251 itself.
So perhaps in that case, the 1st time the IRS will formally get FMV data from me is when I sell these shares, and there won't be info in past returns that would conflict.
Yippee!
