You can apply a coupon code to your account by going to your Account page, selecting the "Plans & billing" tab, and scrolling to the bottom to the Coupon Code entry field. If your coupon is valid, you will get the notification that a coupon code has been applied to your account. Please do note that you will need a valid payment on file in order to fully apply the coupon. Once applied, the coupon will reflect on your next invoice with Bubble.