@fanfare
Line 6a (Social Security benefits) has the total amount of payments for 2021, including the lump sum amount
Line 6b (Taxable amount) has a figure computed from (Line 6a minus Lump Sum Amount) * 85%
I went over the TurboTax 2021 Social Security worksheets and the figures appear to be correct.
These worksheets come from IRS Publication 915, it seems.
