The money you earn from working in Virginia is fully taxable by Virginia, regardless of whether you file as a resident or non-resident of VA.
VA law on whether or not you are considered a VA resident for tax purposes is quoted in my previous answer.
I would also point out that a state's definition of "resident" for tax purposes may or may not be the same as that state university's rules as to who qualifies for in-state tuition.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
