I would like to change my username

You've posted the same inquiry 6 days ago and my colleague sent you a reply. Here's the thread: https://www.jotform.com/answers/821197.

If you would like to change your username, simply provide us the new username that you would like to use so we can proceed. But as suggested, it would be best for you to check if the username is already taken by going to our signup page: https://www.jotform.com/signup.