@blacksmith34us
"business income" ?
Perhaps the SE tax (Medicare and SS) on self-employment income of ~15% PLUS the regular income tax?
Also, at higher incomes, you might get hit with additional Medicare tax (form 8959), or the Net Investment tax (Form 8960)....the amounts from both of those show on your 1040 Schedule 2,
..also, the total added amounts from the above will show up on line 23 of your 1040.
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You'd have to save a PDF of your tax return...before and after that test entry of an extra 10k of "Business" income to see where the major part of the extra tax came from.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
