If you have a different standard delivery address (for suppliers to deliver products) then click Your Delivery Details. Otherwise, if the address is the same you can leave this section blank.
Click: System Config > Your Delivery Details.
Additional Delivery Addresses
Click the button to add multiple extra delivery addresses if required. Click Add to begin a new address.
The details entered here are system-wide but you can customise each user to have their own address (useful for multiple showrooms).
See Users for user settings.