The amount of Social Security benefits not included in AGI does not appear anywhere on your tax return, or in TurboTax. On Form 1040, line 5a is the total amount that was paid, and line 5b is the amount that is included in AGI. Subtract line 5b from line 5a to get the amount that is not included in AGI. Since the taxable amount (line 5b) depends on your other income, these figures will not be accurate until you have entered all your income.
