Keeping your shipping addresses up to date could not be easier, simply follow these 5 steps
Go to your profile home page
Select the "My Settings" link from the left hand navigation menu.
Select the "My Postal Address" link
Click the pencil icon in the top right corner of your existing address to open up the editing page.
Enter your updated address and click the validate button, the system will cross reference and propose you with a suggestion if needed. Once completed, the address will be updated in your account.