@fma2022 , if your husband has a valid greencard, married, has no children/ qualified dependent for whom he maintains a home, then indeed he can file MFS ( Married Filing Separate ). You as a Non-Resident Alien with no US connected or sourced income do not have to file US return. However, the laws of the country where you are living may have an impact ---- some countries look upon all income as marital resource.
I am assuming that you do not wish to submit to US taxation because at this time you have income in your country of residence and you have never had a US SSN and/or visited USA.
Which country are you from and where are you now residing? Any children / and if so where were they born ?
Is there more I can do for you ?
pk
