Hi @jdugh,
Apologies! Unfortunately, usernames cannot be changed at the moment. Doing so would create conflicts with the forms and associated data (A username is used to create a unique id for data and partial permissions. If you changed them, permissions related to this username would not work anymore, and data could not retrieve anymore.).
A safe workaround would be to create a different user account with the preferred user name you wish to have. If you wish to use the existing forms and data (from your previous account), you could share it with your new account or clone it as required.
Have a great day!