we can't say since we have no access to your return. certain items are affected when you are a dependent that are not affected if you are not. The fact your parents didn't claim you is irrelevant. the only way to know is to save a copy of the return as it is now. then go back in to prepare an amended return by checking that box, if every line on every form stays the same as the original then you are ok. if something changes you'll have to wait until your return is fully processed and then file the amended return. if you have a state return also check that.
