In this guide, you will get to know how to change Origin/EA username. You have to follow a few steps explained in the guide, and it will help you out for sure.
To do this, you will need to go to your browser and search for Origin. Then click on the first option that appears on the screen.
At the bottom of the left-hand side, you will see a Sign In option. After you Login, you have to move to the View My Profile option.
At the top right corner, you will see an option of Edit on EA.com.
Now the window appears, and you will need to click on the Edit option right after the Basic Information.
Then it will send you a verification code to your email. After you enter the code, you will be able to change your information.