All your income goes on your tax return; wages, interest, Retirement pay, social security benefits, home sale, etc. etc. You submit only one tax return, with all your income. The TurboTax interview will handle entering all kinds of income, including SS benefits.
Social security only
becomes taxable when added to sufficient other income. If you are
otherwise required to file a tax return, you do need to enter it in Turbotax
(TT). TT will determine the taxable portion.
Social security (including SSDI) becomes taxable when your income,
including 1/2 your social security, reaches:
Married Filing Jointly(MFJ): $32,000
Single or head of household: $25,000
Married Filing Separately and lived with your spouse at any
time during the tax year: $0
After TurboTax (TT)
calculates the taxable portion of SS, it puts the total amount of SS on line
20a of form 1040 and the taxable amount on line 20b (lines 14a&b of form
1040A). TT also produces a worksheet to
show how the taxable amount is calculated. Since you only worked part time, NONE of your SS may be taxable and line 20 may be blank.
Adding SS income to your return will NOT increase your refund. If anything, it will reduce your refund. But most likely will make no difference.
