State Tax

I am currently a student and considered a dependent to my parents. We live in Florida, so we only have to file federal taxes. However, I worked in Virginia for a few months last year and am trying to file my state tax for that job. I already filed my federal tax through TurboTax but forgot to add my state tax. My federal taxes have already been accepted. Is there a way I can go back and file my state tax separately? Is there a free program to do this on?