I made no direct IRA to HSA transfer and that's how I answered that question. I made only one after-tax contribution, below the $2,300 allowable amount as calculated by TT and as stated in the IRS example for Pub 969.
I'll contact support.
But I wonder if the problem is caused by me answering literally the interview question "What type of High Deductible Health Plan did William have on December 1, 2020?" I was not (and am still not sure) why this question asks about 2020 since this is for 2021 tax year. I think the last-month rule should be checking for 2021. I did answer the question literally (i.e. for 2020 and my answer for 2021 would be different).
