In order to edit your Name, Username or Password you have to be logged in to your account.
If you can't access your account , please follow this guide "I can't access my account, how do I reset my password?"
1. On My User Profile page click 'Edit System Password'
2. Type your current password
3. Type new password
4. Retype/confirm new password
5. Click SAVE
If you forgot your current password - please follow the instructions in this article: "I can't access my account, how do I reset my password?"