I got the following off another income tax preparation software company's web site (DIY).
A Part-Year Resident is an individual that moved into or out of the state during the tax year. If you were a Virginia part year resident and had Virginia source income both while a part-year resident and nonresident of Virginia, you must file both the Part-Year return reporting your Virginia source income while you lived in VA and the nonresident return reporting your Virginia source income while you were a Nonresident of the state.
Within the program, you cannot file both a part-year and nonresident return for the same state on the same account. You can download one of the forms from the Virginia website and file the return by mail.
