After you have answered all questions in the Personal Info and Federal Taxes sections, the program will direct you to the State Taxes section, where you will then be asked to answer a series of questions regarding Virginia.  In the Income section of the State Taxes interview, you will be directed to a page with the heading, "Here's the income that Virginia handles differently" - screenshot of the page is attached.

Under Education, the Virginia College Savings Prepaid Tuition (Section 529) Plan is listed.  Click on the Start button for the Virginia 529 Plan, and you will be directed to a page asking whether you have ever had a 529 plan, and a subsequent page asking whether you have made a payment or contribution in 2016 to a Virginia 529 plan, or have a carryover payment or contribution from 2015.  If you answer yes, a page will open, entitled "Enter Your Account Info and Activity" (screenshot attached), which will enable you to enter your 2016 or 2015 carryover payment or contribution, and other account information for your Virginia 529 plan.