You can actually get a ITIN number for your spouse. Since the spouse is not a resident they may not get a SSN. You can use the ITIN number for tax purposes. That is what I did.
Waiting for priority date during the follow-to-join process to get the date for the GC interview for the spouse. Meanwhile, I have a basic important Q. My spouse didn't visit USA in 2008, so while applying for tax returns, can I file married jointly like in the past? Do you think this will impact her greencard, if I file married and joint return? Meanwhile we are planning to apply visiting visa until the priority date comes current. Please help, I need to file tax returns. If I say I am married and filing separate, I need to pay big amount.....please reply asap...thank you.