Yes, you can add new shipping or billing addresses by logging into your account and clicking “Your Account” on the top right of the page. Go to “Settings” and click on “Address Book.” Then click on “Add New Address.” From there you will be able to add new addresses. You can only assign one address as your default billing address and default shipping address. You can change this setting by clicking “Edit Address” and checking either "Make this my default billing address" or "Make this my default shipping address." After you have selected a default shipping or billing address, you will see a star marked to indicate your defaulted addresses. You may also add a new address at any time during checkout and save it for future use.