Married Filing Separately for PSLF

I am currently working my way through the course- love it!-- and saw in one of Jeremy’s archived office hours (October 2020) that I cannot do a Roth IRA because I am married filing separately (for student loan reasons) and make more than $10,000. My husband and I will switch to married filing jointly once my loans are forgiven under Public Service Loan Forgiveness, but that’s a few years away. I have a 403b, should I add more to my monthly contribution there instead of my original plan to do a Roth IRA since that’s no longer an option to me? Help!