My spouse and are seriously considering divorce. She has filed her income tax this year as Married filing seperately without my knowledge. She has also claimed the mortage interest paid and both children. Both of our names are on the mortage, however due to her higher salary she pays that and my check goes to other household expenses. Should I take her to court? She also refuses to give me a copy of her tax return, am I entitled to see it to insure I don't claim anything she already has? Should I just file and let the IRS solve it?