assuming you were married on 12/31/20 you file either a joint or married filing separate (MFS) federal return. in general, filing jointly will likely produce a lower tax than using the other status. form 8958 is only required if you use the MFS status. it's not clear whether or not you lived in a community property state and were married at the end of 2020. if you clarify your situation, including which state(s) you lived in, it would be easier to give you your options for state filing if your states have an income tax. .
