Long story short. Found out I had a half brother and he's been staying with me for the past year while going to a nearby community College.
Was doing my taxes and discovered he technically qualifies as an dependent and I can claim head of household status.
However, he has a different last name and is only genetically related but not in a legal sense (i.e. birth certificate doesn't have father's name).
Can I still claim him as a dependent? Will IRS call or ask for additional proof? I can provide evidence in genetic tests but I'm guessing I'm over thinking this unless I'm audited.