I just received a letter from the IRS claiming that the total retirement income taxable reported on the 2021 return was less than what the IRS calculated it should be (off by many dollars!). I checked the basis of their calculation of my total retirement income from their letter and it is correct. I checked the inputs to TurboTax and they are correct. What I cannot figure out is how they got an incorrect total out of the electronic filing for 2021 from Turbotax. The only thing they say is they extracted specifically is my total income from line 15 of 1040 (which of course has more than just my retirement income). Where is a calculation of total retirement income in TurboTax they claim is incorrect? I can't find it. Thanks!
