first year filing jointly and awaiting green card

Dear Tax Professionals,

 

I am writing to request advice regarding my 2023 tax return. My wife and I were married in March 2023, and we are currently awaiting her green card, which is expected to arrive in mid-to-late October. Due to this, we have been unable to obtain her social security number and file our joint tax return.

 

In addition, I sold my home at a profit shortly after our marriage. We intended to file jointly to potentially reduce our capital gains tax.

 

We have already filed for an extension, allowing us to file by October 15th. Given the uncertainty regarding my wife's green card arrival, I am wondering if there are any options for filing jointly even if she does not have her social security number by the extension deadline.

 

Thank you for your time and assistance.