Because you're married and don't have a legal separation, if you file a tax return, the status would be "married, filing separately". However, payments between spouses are not considered income for tax purposes. If you file a return, it would show zero income. In Ohio, you aren't considered to have earned half his income (Ohio isn't a community property state). If he filed joint returns for previous years and signed your name without your knowledge and permission, you need to file Form 14039 Identity Theft Affidavit. You have no tax liability for years in which you have no income and didn't sign (or consent to) your spouse's filing a joint return. However when the IRS got the joint return from your husband, they assume that you also signed it. You need to inform them of the facts.
Answered on Mar 18th, 2014 at 3:38 PM