H.R.
You need to go and make a petition through the court. He will need to come to court, if he doesnt then a warrent will be issued for his arrest. If you have previously went through court for the support (some people just have an agreement but not a legal pettition) then it should be no problem getting it. They will probably increase the support if you go back to court. if I were you i woiuld file a petition with the court for back support right away. You can challenge the tax return by showing proof that the child resided with you. you need to get a statement from your pediatrition showing that he resides with you. If you submit this to the irs, you will be granted the child deduction and your ex will be paying a fine. e mail me if you have any questions. We went through something similar. My step son lived with us, but his mother claimed him. My sister is also a lawyer and guided us through everything