Unfortunately the 1040 form changed in 2018 and 20a is not social security benefits. Line 21 on the 1040 does not appear to be the correct place to put a negative number. I went to form 1040 line 5 social security worksheet and overrode the taxable social security benefits and wrote in”exempt.” I probably got the correct amount of tax by doing this. Shall I submit the worksheet or is there another place I should write “exempt?”
