You cannot establish residency on your own after coming to Virginia to get an education.
Your parents would have to show by clear and convincing evidence that their move is because they intend to live permanently in Virginia. Accepting a written job offer in state, for example, would support that. And they would still have to be here 12 months before residency would be established.
Www.schev.edu explains the guidelines schools use in establishing residency in extensive detail, but you would still need to convince the university that the move was not simply a ploy to get discounted tuition. For example, what other convincing explanation can you give for why your parents moved, and what supports that explanation? Do you have extended family in state they want to live near? Were they from Virginia themselves originally? That kind of thing, ties to the state other than you starting college.