Instructions
PlayStation 3 and PSP
Turn on your PlayStation 3 or PlayStation Portable and sign into your profile.
Navigate to the "PlayStation Network" tab on the user interface.
Select "Account Management."
Select "Account Information." From here, you can edit your sign-in name, billing information, address and other PSN account features.
PC
Download and install the Media Go program from Sony's website (see "Resources" below). Media Go allows you to connect to the PSN from your PC.
Double-click the "Media Go" icon on your desktop to start the program after installation is complete.
Click "Store" on the list on the left side of the screen.
Click the "Account Management" icon. Select "Account Management" from the drop-down menu.
Enter your user name and password in the fields provided. Click "Login." From here, you can edit your login name, billing information, address and other PSN account features.