@besito89 , touche' --- I stand corrected -- yes you write RA in lieu of NRA.
You still did not tell me which country are you from ? I would have guessed Spain but I am often wrong in such dataless guesses ( perhaps because of your nom-de-plum "besito" -- little kiss in Spanish. LOL. I keep asking for because , absent a treaty covering the situation, as a student if you are receiving a stipend that is used for living expenses, it may be taxable income. Most treaties, cover this for international students , trainees, researchers etc ( F, J ).
Since you filed a paper-return for 2021 (?), it may not have been processed - but you have filed. I would hold still to see what the IRS does ( any amended return would just create more issues).
In the meantime , however, I would urge you to refile (with ALL required documents) application for ITIN for your spouse. so that by the time 2022 filing season comes into force , you can file as MFJ. Then you go back and file and amended return for 2021 ( if so required i.e. IRS had changed your filing status as MFS for 2021 )
Without knowing which state you are domiciled in , I cannot take a position but generally you are correct in that you may have to amend the state returns once you amend the federal.
Does this help ? Is there more I can do for you ?
