I have edited the practice area of this question to Tax Law. This question is best suited for a Tax Attorney or a CPA.
Under an Immigration Law prospective, submitting your tax returns as "married filing jointly" may be used to evidence some good faith in your marriage.
Hope this helps and good luck.
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The above is NOT legal advice, and is NOT intended to be legal advice. No Attorney-Client relationship is created through the above answer.
This is a question for an accountant. You may file taxes with your social security number.
This is not legal advice until I am retained and have reviewed all facts about your situation.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.
For immigration purposes you should file married filing jointly so you have the documents to prove your bonafide marriage to USCIS.
www.gassonlaw.com - Disclaimer: This a general answer to your legal question. Unless you have a signed engagement letter with me, you should not consider this information to be legal advice.