I got a 1042 s form instead of a 1099 B form from fidelity. how do i enter that in turbotax?

Are you a nonresident?  Please advise when you arrived in the US and your visa type. Many thanks.

I'm in h1b visa, have been here for 6 years, 2 years without leaving the country

Thank you.  As you are a US resident, you should not be receiving a 1042-S.  Please work with your broker to update your tax status.  You should complete a Form W-9 to let them know that you are a US resident and exempt from backup withholding. 

You should enter your 1042-S form as if you received a 1099-B if it is for stock sales.