When logging into your Fan Rewards profile, navigate to the dashboard page (https://www.nascar.com/fanrewards-dashboard) and scroll down until you see “Enter a Valid Fan Rewards Promo Code Here To Earn.” This is located on the lefthand side of your screen on desktop and right below your dashboard on mobile web.
You will then enter the provided promo code in the “Fan Rewards Code” box and press “Submit.”
(Example of promo code form on page)