I have a similar issue to Classy02. I am the non-custodial parent, paying child support, but now living apart from my child. His mother and I were never married. The pre-2008 child support agreement states that I can claim him as a dependent in odd years. (It's a court order, entered in 2005). I recently tried to e-file my 2019 return, but it was rejected because he was already claimed. I removed him as a dependent and am now trying to determine if I should file an amended return with his information. I can provide a copy of the agreement.
