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My total taxable income after the standard deduction is $36,709.  TT is stating that I owe $5,392.  But, that doesn't align with the US tax tables for 2024:  10% for the first 11,600 and 12% for everything thereafter, thus $1,160 + ((36,709-11,600)*.12) = $4,173.08.  I'm not a mathematician nor an accountant but the math seems pretty straightforward. I'm wondering now what other internal errors there might be.