Please view this thread with Q&As about the VA 529 plan and how to enter it in TurboTax.
529 plans are tax-advantaged savings plan named after Section 529 of the Internal Revenue Code. The intention of 529 plans is to encourage college savings. Every state and the District of Columbia, and even some educational institutions sponsor a 529 plan. There are two types of 529 plans: college savings plans and pre-paid tuition plans. Investment options, expenses and other specifics vary from state to state.
Here's a TurboTax article with more information about 529 plans.
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