To sign into your account simply click the account icon located on every page. For desktop users the icon will appear on the top right-hand corner of every page. For mobile users the icon will appear underneath the top search bar on every page. You can also click this link to be taken to the login page.Once logged in click the button that says "View Addresses" in the right-hand column. This will take you to a new page where you can edit or delete existing shipping and billing addresses. You'll also have the option to add new addresses to your account.