Some states allow a deduction on the state return. If your state is one, it will come up in the state interview; usually in the "Here's how (your state) handles income differently" section.
I have verified (desktop Deluxe) that the Virginia program has it in that place. Enter at:
-Education
-Virginia College Savings Prepaid Tuition (Section 529) Plan
On the next screen, answer Yes, we had one of these plans, then follow the interview. The wording is a little more "involved" than most other states.
