RSU was vested in 2018 with sell-to-cover option. I didn't sell the rest. The gross value shows up on my W-2 in Box 14 as RSTOCK, which turbotax don't know how to handle it.
I also received 1099-b for the RSU due to sell-to-cover. It said "Transations for which basis is not reported to the IRS and for which Short or Long Term determination is unknown(to broker)".
Should I fill this 1099-B form in TurboTax? If yes, then what's the total cost basis(empty in the form). Is "short term notcovered" right for Sales category?
And the 1099-B has number in "Federal income tax withheld" field, anything should I do with that number?
The amount stated in Box 14 for RSUs is already included in Box 1, where wages are. For example, if we have $234,567 reported in Box 1 as wages and $12,345 reported in Box 14 labeled as RSUs, then the $12,345 is already included in the $234,567 amount.
Restricted stock and restricted stock units are included in an employee's taxable wages when one of two things happens:
Basis in restricted stock is the amount paid for the stock plus the amount included as taxable income. The sale should be reported on the 1099 B and you will have to fill in the basis from your own records.
The amount shown on Form W-2 is included as part of the cost basis in the shares. This is reported on Schedule D and Form 8949 in the year that the taxpayer sells the underlying stock.