the taxable portion of social security line 5b on 1040 can range from 0 to 85% . in TT this is a worksheet that calculates the taxable portion. unfortunately, since TT is in transition to 2019, the worksheet may not be available to view or print
here's a link to 1040 instructions page 33 has the worksheet where you can do your own calculation, if desired. it should be noted that I have not seen any threads were there was a report of an incorrect calculation of taxable social security
https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
if line 5a on the 1040 is not the same as box 5 on the SSA-1099 you entered something incorrectly
