I moved to the UK in 2018. My husband(British) gave up his green card in 2018, and we filed taxes for 2018 as him being a US resident. Now in 2019, he has no legal status/green card. I wanted to file as married filing separately, but would that mean that he has to file a return as well?
And would it be better to put his social security number or Non-Resident Alien in the social security section?