Q. Do i claim hoh if my 21 y son lives with me. i dont claim him as a dependant
A. No, he must be your dependent, to be a qualifying person for Head of Household filing status.
There is one exception to that rule: If he is not being claimed, as your dependent, because his other parent (the non custodial parent) is claiming him as a dependent. Even then, it would depend on more info.
