Hi, @Critter-3 , thanks for responding.
I eFiled the taxes through the TurboTax service, so presumably not a data entry error by the IRS.
I fired up TurboTax 2021 on my computer and went over the entries for the Social Security Lump Sum. What I have looks correct. TT is definitely showing the correct amount for the Lump Sum.
It is just that TT is assessing zero tax on the Lump Sum amount.
