My total income this year was less than the standard deduction amount of $12000, but after entering all my info, TurboTax says I owe $711. Could it be wrong?

[xmasbaby0]

Was any of the income self-employment income?

[hanashin]

Yes most of it was

[Vanessa · Accepted solution]

Self-employment taxes are calculated separately. They are 15.3% of your income from self-employment. They are only reduced by business expenses which decrease your profit.

 The standard deduction does not decrease your self-employment tax, it will, however, reduce your regular income tax on your total income including income from self-employment.  If you look at your Schedule 4 you will see the Self-Employment tax reported on line 57.  It is computed on Schedule SE then appears on line 14 of your 1040.