You can only change the name once in three months. Here's our Help Center article that has more info on 'Change your channel details': https://goo.gl/mP917z . Hope this helps.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
You can only change the name once in three months. Here's our Help Center article that has more info on 'Change your channel details': https://goo.gl/mP917z . Hope this helps.