Also, it will affect both of your tax returns. If your parents claim you as a dependent, they will get a tax deduction for you on their return, and pay less on their taxes. And you will not be able to deduct yourself and will pay more.
Based on the earlier response, I guess that you need to count days and decide who gets the deduction. Just make sure that you don't take the deduction, or you will both hear from the IRS.
