Told my STBXW to only take one of our two kids as a deduction when she files. I would deduct the other one. She refuses to file jointly which costs both of us thousands of dollars every year. We are not divorced; there are no court orders or legalities involved here. I went to file and she took both kids because she filed first. I went from a refund of about $1,300 to owing $6,500. Women are awesome. Never ever ever ever fucking ever again.