Are you saying the $58,000 is all net self-employment income? If so, then in addition to income tax at whatever your tax bracket is after your standard deduction, are you also considering the self-employment tax of 15.3%? On $58,000 of net self-employment income, the SE tax alone would be close to $9,000.
We don't know exactly what you are looking at. My next comment below will tell you how to preview your actual return so you can see how TurboTax is handling the income tax and SE tax.
