@ss1811 , if you are still on OPT, then you are exempt from FICA taxes ( both you and your employer ). As far as I know ( I will have to look at the statutes / rules on this again ) training using STEM category, you are still immune from FICA. So I do not expect that you will have to pay any FICA in any case. Will come back to you in a few days --- please excuse
Namaste
pk
