Can I amend my 2023 tax return to MFJ if my spouse’s ITIN was issued with our 2024 return?

[kruthika]

I filed my 2023 tax return before my husband had an ITIN, so I wrongly filed as Single (2024). In 2025, I filed my 2024 tax return and applied for his ITIN at the same time. The IRS issued his ITIN this year (2025, during the 2024 filing process).

My question is:
        Am I still allowed to file an amended 2023 return (Form 1040-X) to change my filing status to Married Filing Jointly now that my husband has an ITIN, even though it was only issued during the 2024 filing?

Would appreciate guidance on whether this is possible and what the process would look like.

[Opus 17]

You are required to file using either married filing jointly or married filing separately.   Yes, you can amend, the instructions are here.

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...

If you file jointly, you must declare and pay tax on all your combined worldwide income.  If your spouse is overseas and earns income overseas, this may mean paying tax on the same money twice, although there is an offsetting deduction.  Depending on where your spouse lives, what their income is, and if they also pay taxes overseas, you may want to file married filing separately or jointly.  It depends on your exact situation and there is no one size fits all answer.