The page with the address fields are a part of the standard checkout pages in the eCommerce purchase flow. If you edit your eCommerce Store and go to step 12. Configure Standard Pages, then you'll see "Cart, Checkout, Single Address Entry Pages." The address entry page is a part of that template and any changes would need to come from our web developers as part of a customization. If you are interested in having a customization done, then please reach out to your Account Manager (BB12487).