You have to contact chess.com directly thru the help link. I've had mine changed that way, you will need to give them a few options in case your first choice is taken. I believe when you click the help link, there is actually a FAQ on this topic.
Screen Name

Rookbuster wrote: You have to contact chess.com directly thru the help link. I've had mine changed that way, you will need to give them a few options in case your first choice is taken. I believe when you click the help link, there is actually a FAQ on this topic: How can I change my username?
Is there any way to change my screen name on the site? I can't figure it out.