Disclaimer: The materials provided below are informational and should not be relied upon as legal advice.
I am sorry to hear about your situation. If your dissolution of marriage has not taken place, you probably need to file your return as a married person. The answer to your question will depend on whether your wife is cooperative with you in signing the return. If so, you can file jointly. If she will not, you have no choice but to file separately. Be sure to consult your own attorney to protect your legal rights.
You have to choose: to file jointly you need her signature. This material is covered well in IRS publication 501: http://www.irs.gov/publications/p501/ar02.html#en_US_2012_publink1000220742
Your only two choices are to file married filing jointly or married filing separately. You have to weigh incurring the large tax liability against disclosing all of your financial information. The question you have to answer is what is more important: keeping your financial information private or lowering your tax liability.
Keep in mind that you may have to disclose your financial information during divorce proceedings anyway.
firstname.lastname@example.org Office number: (860) 255-7423 Website: www.cttaxhelp.com. Our reply to your question has not created an attorney-client relationship. It should not be considered legal advice. You should contact an Attorney who can give you legal advice after acquainting themselves with the specifics of your case.