My ex and myself were never married and had 2 children together. We lived together In 2018 and I made less than $3,000. I allowed him to file me and our children as dependents on his taxes with the agreement that he would give me the tax credit for one of the children and for myself. I believe he lied about the amounts and gave me less. Do I have a right to access those documents if he is refusing to provide them to me?