If you are using Turbotax to do your return, it will ask "can anyone else claim you as a dependent". The answer is yes (assuming you have no residence when you are not in school, other than your home). Then it will ask are they claiming you. The answer is no. This means that you cannot claim yourself as an exemption, but you may still qualify for an education credit.
If you really have moved out for good, then their tax preparer is correct.
