If you have redeemed your rewards points for a discount at checkout (whether $5, $10, or $15), you must copy the automated code and paste it into the discount code field at checkout.

If, however, you closed the window or lost track of the code, simply click the Rewards History button (see below).

In the new window that appears you will see a list of all your rewards-related transactions, including your discount code which you can copy from this screen and paste at the checkout page.