I have a question on my son being claimed on ex-wife’s taxes. My son is going to be 20 in a couple weeks (scary). He has income, summer work and interest from bonds we had to cash for school. I can put the income on my tax return but, can I now claim him on my taxes? I don't want the added income and not the deduction. I supply all finances for Kyle's school and living expenses. I don't know how the agreement holds in the legal document stating ex-wife can claim this son? Does this end like the support for him ended when we modified the contract (child support)because of his turning 18 years of age?