Hello @Cyclone.8250 and welcome! Currently that option is disabled.
This was recently posted by staff.
Changing Username
- In the past, we had to deactivate the renaming system due to technical reasons. We know that this function is important to many people for various reasons and are therefore working on reactivating it as soon as possible.
You can take a look here → TS6 BETA Release - Updates & Ongoing Issues
One piece of advice: Before posting a question, take a moment to search the forum, as many questions have already been asked and answered.
