@user17672869738 , I understand your situation.
On the question of FICA/SECA --- absent a totalization agreement between US and your spouse's home country ( please tell me the country or you can google or visit Social Security Admin regarding "totalization agreements), she will have to pay SECA -- she is considered self-employed for purposes of SSA and Medicare.
Just for your reading pleasure , please see the statute here -- applicable section is 6013(g)-->
26 U.S. Code § 6013 - Joint returns of income tax by husband and wife | U.S. Code | US Law | LII / L...
Is there more I can do for you ?
