Solved
The W2 federal withholding entered in TurboTax is $83885.79 but the amount reported in the final tax return is $84428. I can't trace that number and can't fix the problem. Thanks.
Check any 1099R forms box 4. Also If you have a lot of investments there is an extra Medicare tax on 1040 line 62. That is offset with an extra amount on line 64 with withholding.
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