How do you change your username?"
You have to use the "Contact Us" link. I'm not sure, but the last I heard they only let you do this one time.
Use Send in Feedback. Only PBS can change user names and member names.
What they said. Go to the bottom right corner of any page here. Under "company" click on "contact us" then use the Feedback option there. They'll make the change for you.
Thank you for your patience