@angiebarr123 - The rules changed drastically starting in 2018. There is no longer a $4000 deduction (Known as a personal or dependent exemption).
Most importantly, with the tax law change, most (your's does) dependents will get the same refund whether they claim themselves or not. The personal exemption has been eliminated and the standard deduction increased.
So, yes, you should definitely claim him, since you qualify. He's too old for the $2000 child tax credit, you will receive the $500 other dependent credit, instead and maybe some EIC.
