You can add a new delivery address during checkout or from your account settings. During checkout, navigate to the Shipping Address section and click Add New in the top-right corner. Enter the required address details and click Continue to save and use the address. If you prefer to use an existing address, select Stored Addresses, search by account name, account number, or address, and choose the appropriate delivery address.
Alternatively, you can create new delivery addresses at any time by going to Account Tools > Personalisation > User Profile > Checkout Defaults.