Tax calulation

[RJE2]

I have taxable income of $77748 (SocSec + basis IRA distribution + small income for contracting).  According to tax tables I should pay $2,055 plus 12% of the excess over $20,550.  This would come to $8918.76.  However, Turbotax calculates $9523.  Can someone explain the difference?

There are not capital gains, stock sales, etc.  I'm taking standard deduction.

[MinhT1 · Accepted solution]

Your income from contracting is self-employed income and is subject to self-employment tax which is calculated at 15.3% on 92.35% of your self-employed income. This is in addition to regular income tax and would most probably be the reason for this difference.

[Mike9241]

look at schedule 2 line 4 for the self-employment tax