Using TTAX 2016 Home and Biz.
Initial import of income from Quickbooks was too low compared to actual sum of 1099's received. I corrected the amount in the inputting of the 1099's. Income went up 6%. OK fine, but with all else exactly as inputted the Fed tax jumped 53%!! I backed out the increase and it went to where it was before so it's all related to the increase.
What's the problem? I expected SOME increase in tax liability but this was nuts!