If you find that the username you want belongs to an Inactive Account, you may request that username from support. Check out this article to learn about the requirements: How do I request an inactive username?
Click Settings from the menu at the bottom left corner of any page on Chess.com.
In your profile settings, click Change next to your current username.
Enter your desired username and your password.
Click Save to apply the changes:
Please choose carefully; members can only change their username once every 90 days.
Important to remember
Your username must be at least 3 characters long and can only include letters, numbers, underscores, and dashes. It must start and end with a letter or number. Spaces are not allowed.
You cannot change your username if you are in a Live Chess game in another window.
If the username is already taken, you will see a notice indicating it is not available.