In 2009 I was told I was claiming both of our children on my taxes and would be paying an extra amount to my ex because I claimed them. My ex continues to claim one of our two children. I have the DissoMaster that her attorney prepared stating I'm to claim them both which gbe me 3 exemptions. Since 2009 she is claiming my kids and won't sign the forms for the IRS. Is there a law or civil code for this? What can I do?Also if the order changes in the middle of the year from her being able to claim one child of our two and then they give me the right to claim them both in September 2009. Do I claim them on my 2009 taxes or does she?