To edit information on file in your Yahoo! Wallet:
- Sign in to http://wallet.yahoo.com with your AT&T Yahoo! ID and password.
- Enter your Yahoo! Security Key.
- After you have entered you Yahoo! Security Key, you'll see a screen that displays your name, the last four digits of your credit card, and your billing and shipping address information. Click on the "Edit" button next to the information you would like to change.