Things You'll Need
Instructions
Turn the system on, then sign in. By default, you will automatically be signed in. If you are not, go to the "PlayStation Network" tab and select "Sign In."
Move to your name under the "PlayStation Network" tab and press the triangle button. In the new menu that appears, select "Information."
Click on your profile name and an onscreen keyboard will appear. Type in whatever name you want. Press "Start" and your account name will be changed.