Dealing with the IRS and income taxes can be stressful. Every year we have to file our personal income taxes and things only become a little more complicated when you get married and add another person to the equation. Tax liability for spouses is dependent on the status of your marriage when your spouse filed that return. Any tax debt that was incurred BEFORE you were marry, your spouse is solely liable. Any tax debt incurred during the marriage and filed jointly there is a potential for liability. In this instance, the you must prove you had no knowledge of debt and could not be reasonably expected to know, and that you received no benefit from the refund.