On the Form 1040 Line 6a should be the amount from your Form SSA-1099 box 5
To enter Social Security benefits reported on form SSA-1099
Or enter ssa-1099 in the Search box located in the upper right of the program screen. Click on Jump to ssa-1099
Enter the gross amount in box 5, not the net deposits.
Then the taxable amount (if any) is on line 6b. Up to 85% of Social Security becomes taxable when all your other income plus 1/2 your social security, reaches:
Married Filing Jointly: $32,000
Single or head of household: $25,000
Married Filing Separately: 0