The tax table you are looking at is for ordinary income only. Some income is taxed at different rates (Qualified Dividends/Long-Term Capital Gains are taxed at a lower rate than ordinary income). If you have any of the following included in your return, the tax table will not give you accurate results:
Do you have Long Term Capital Gains or Qualified Dividends? If so, there should be a worksheet for that (you may need to look at the "all" worksheets).
Does your tax return have Form 6251?
Or do you have Foreign Earned Income that was excluded?
The tax table you are looking at is for ordinary income only. Some income is taxed at different rates (Qualified Dividends/Long-Term Capital Gains are taxed at a lower rate than ordinary income). If you have any of the following included in your return, the tax table will not give you accurate results: