Go back through the Personal Info section using the desktop editions. Assuming that you indicated that you were filing as Single.
A dependent age 17 or older can be eligible under the Qualifying Relative rules if they are not a full time student. Go back through all the questions and make sure that you indicated he did not have gross income of $4,700 or more and that you provided over one-half of his support. Also, the program should have asked if you contributed more than one-half of the cost to maintain your home, answer Yes. If you answered all the questions correctly then the program would have given you Head of Household filing status.
If not, then delete him as your dependent and then re-enter.
