I don't get SSI, just regular social security per SSA-1099. The figures appear on the Social Security Worksheet, Lines A, B and C. When I look at the Mod AGI Worksheet in Turbo Tax the figure it shows at the bottom of the schedule (MAGI) is less than my AGI by the taxable SS figure from the 1040 Line 6b. From what I've read it should be higher by the non-taxable portion of my SS benefits (difference between 1040 Lines 6a and 6b).
