Get your taxes done using TurboTax

Figured it out; and I am thinking it was the state refund complicated, terrible Turbo Tax calculation.  But here's another problem if I could have your input I double checked the taxable income line 15 on IRS 1040: it was ok, and then double checked the tax I owe using the IRS tax table from the book and Turbo comes out with a lesser amount. So I had my brother, a bookkeeper, double check my math, and he says I am right.  Do you have any clue where they hide the tax computation worksheet in the software? I am would like to see how they come out with that tax using the same amount I used on line 15.