There is no 11.3% rate.
That rate is just an approximate/handwaving number.
Your actual taxes are calculated using either:
the IRS Tax tables
or
one of ~ 7 different tax calculation forms, depending on what types of income were in your tax file.
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At this point in time, there are no known Federal tax calculation problems (but it is early).
IF..(big IF) if you have a simple tax return, with just ordinary wages and simple interest, that only uses the IRS tax tables (and no Self Employment income, no qualified dividends, no capital gains or losses)
Then, you take your "Taxable Income" (line 15 of the Form 1040), and compare it to the IRS tax tables to get the tax that the IRS will assess:
Publication 17 (2024), Your Federal Income Tax | Internal Revenue Service
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
