@Sam Hopi , I have to apologize for my mistake ---- this is to correct the position I took above that both J-1 and J-2 each must file 8843 ( i.e. declaring that you are exempt from counting days present ). On re-thinking and despite the implication of the 8843 instructions , ONLY the J-1 needs to file the form 8843--- the J-2s are dependent visa holders and have no independent ( at this time ) status. Please excuse my mistake.
Also , on SECA / FICA , absent a tax treaty assertion or a Totalization agreement, you are not immune from SECA ---- since you have a SSN, suggest a visit to the local Social Security Admin office --- they are usually very helpful and understanding.
You also did not answer (a) how you filed 2022 return and (b) why the reluctance to seek professional tax advice --- once you understand the ins and outs of the US 1040-NR filing, the you certainly should be able to do it yourself using a platform that supports 1040-NR filing.
Hope this makes sense and also clarifies the situation .
pk
