State tax filing

For nonresidents, Virginia first computes your total income as if you were a full year resident.  The Virginia Nonresident tax return starts with your federal adjusted income.  It will also use your federal Itemized deduction, which is what you are seeing.  It then calculates the Nonresident Allocation Percentage by using your total income and your Virginia-only income then applies that percentage to the total taxable income to get the Nonresident taxable income.  It then applies the state tax to that amount.  (See below)

You can also get live support by going to What's a Support ID and how do I get one?.