First, log into your Affiliate account here. Be sure you select Affiliate Login, not Merchant Login.

You will be taken to your account Home screen. On the left side of the screen, click "Promotion" and on the sub-menu, click "Banners and Links."

This takes you to the page with all your banner options. Once you select which banner you want to use, click "Show Banner Code" under the image and you will be given the code to copy and paste into the code section of your web page.