She also informed me that she allowed him to file for her and our daughters in 2012 using the tax form for release or consent to file. I am not sure exactly the name of the form. She states that his tax attorney had it on file from last year and allowed him to file them again this year. If push comes to shove, I believe that she will state to the IRS that is was filed with her consent in order to maintain her relationship. Can I fight this?