If a 35 year old stepson, on SS disability is living (wherever he can) receives financial support from us, can he be claimed as a dependent?

[Vanessa A]

Probably not, because you would have to pay more than half of his support for the year in order to claim him as a dependent.  If he is living wherever he can, unless you would be paying his rent, he or whoever was letting him stay there for free would be covering the cost of his food and shelter.  

To claim someone as a Qualifying Relative, they must be:

• Your child ( including step children, adoptive children and foster children) or a descendent of them
• Your sibling (including half siblings) or a child of your sibling or a sibling-in-law
• Your parent or grandparents, including step parents and in laws
• Any other person that lived with you for the entire tax year
• Not a qualifying child of another taxpayer
• Someone that you provided over half of their support for during the tax year
• Has less than $4,700 in income (not counting social security)