Filing options for married daughter with foreign husband awaiting resident visa?

Been looking at some of the rules on this, but not seeing a simple solution here.

Facts:

1) 25 y.o. daughter lives in my house. She is a legal permanent resident, soon to be eligible for Naturalization.

2) She had 0 income in 2023.

3) She married her long-time boyfriend from her home country in Jan 2023, and has filed for him to immigrate to the USA. Don't expect that to happen until around Jan 2025.

4) He is awaiting his visa, working a factory job in his country.

 

Since my daughter had no income last year, don't think there will be any taxes or EIC to contend with. So decisions on filing status should be able to be made based on what is simplest. Am I right on that?

 

Husband has no SSN or taxpayer ID. Do we even need to consider him (or his limited earnings) before he comes to the USA next year?

 

Just sat down to do her tax return. And in fact, I don't think she would even need to file. But I thought it might be beneficial for her to file even with 0 income, just to have a filed tax return in case any future situations she's in are requesting a past tax return.