What is the name of your state? Illinois Hi All, I have a seventeen year old daughter who is mentally and physically handicapped. She lives with my wife and I and will for a long while. We were her sole supporter her whole life and will continue to do so. She is currently enrolled in a special program at a high school in the area. My question is " can I claim her as a dependent?" She turned seventeen on Juyl 24th. She cant work so she cant file her own tax return. Im really lost on this one. Any advise would be greatly appreciated. Thanks