By marriage visa , do you mean K visa or what? What is your ( assuming you are the husband ) immigration status -- US citizen/ resident/resident for tax purposes? What country is she a citizen of ? I am assuming that because she was on F-1/OPT , she had already completed her five years of exempt status ( yes ?). When in 2018 was the visa changed? When did she first enter the country with F-1 ?
I am asking all these , because it is possible that she is still a non-resident alien and still on on OPT status , implying she does not need to have FICA withheld.
