maglib
Level 10

Get your taxes done using TurboTax

The sell to cover, your cost basis is probably reflected as 0 which you know is not correct as they do not reflect the compensation portion of the basis.

Enter them both by searching 1099-B in upper right corner and selecting Jump to. Enter the information manually.

enter the 1099-B as it reads regardless that the amount in box 1e is not accurate. Then follow:

1.If the stock you sold was from an employee stock plan other than ISO stock, and you have a statement showing the corrected basis (or you otherwise know the corrected basis), then you can simply select the option to "enter additional info on my own" (or just click Continue if the "on my own" button isn't present) and enter the corrected basis on the next screen.

2. However, if the stock you sold was from an ISO plan, or if you don't know the corrected basis and need help calculating it, then you should select the "step by step" option. This option will take you through a series of questions about your sale, and help you determine the correct basis for employee stock.

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.
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I am NOT an expert and you should confirm with a tax expert.