To edit your default shipping address click on the circle at the top right-hand corner of the page with your initials or profile picture and select ‘Account Settings’ (https://www.undergroundcellar.com/account) from the pop-out menu.
At the bottom left-hand side of this page, you will see all you previously used shipping addresses with the option to add a new address, change your default address, or remove an address from your account. You can also add a new shipping address when requesting a new shipment.