I had the same problem and no matter what I did my returns kept getting rejected related to 4972. I called Turbo Tax and they had no clue - I did what they suggested and nothing worked.
Finally I found someone who found the problem. An unknown entry on one of the 1040 schedules - I think Schedule 3 line D3? Somehow a number - in my case $325 was there and this is on the line for taxes from a final lump sum distribution which is what 4972 i for. I zeroed out that number and I refiled again and this time it worked.
It has to be a turbo tax bug - my guess is from the auto import of broker info - but I am not sure _ All know is I have no idea why that $325 tax was there.
