"where do i enter the "withhold to cover" amounts to show I paid taxes?
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You don't. The stock sold "for taxes" was passed back to the employer, who paid the governments, and included those amounts in the "taxes" boxes of the W-2. You don't get to claim them again. (If the broker had withheld those amounts they would be reported in Boxes 4 and 16 of the W-2.)
Almost certainly you're asking this because your tax liability went way up when you recorded the sale. That because you are using the wrong basis for the sale as the broker is only reporting $0, your "out of pocket" cost.
Enter the 1099-B as it reads on the default TurboTax 1099-B entry form but then click on the "I'll enter additional info on my own" blue button. On the next page enter the correct basis in the "Corrected cost basis" box. The correct basis is (number of shares sold) x (per share "fair market value" used by the employer to calculate the compensation reported on the W-2).
TurboTax will report the sale on Form 8949 "as reported by the broker" but will put an adjustment figure into column (g) of the Form, a code "B" into column (f) of the Form, and the correct amount of gain or loss which includes the adjustment.
Tom Young
