Thank you very much for the reply.
I found the problem: I had an unexpected carry forward QBI loss from 2021 return also using TT. I had a positive QBI in 2021, however, the Worksheet had a bug which replaced a number with a larger duplicated negative number! I have just tested TT 2021 Premier by typing in the correct numbers again and saved it as a test copy, which shows the same error in the QBI Component Worksheet!
Unfortunately I did not find this error before filing 2021 return because it only affected the carry forward amount without changing 2021 tax owed. Anyone else had the same issue?
