“How do I change my username on Twitter?”
1. Sign into your Twitter account.
2. Head over to your profile page (just click on that link). Or you can manually go there by clicking on the Profile arrow, and choose ‘Settings’, it should automatically take you to your ‘Accounts’ page.
3. In the Username box, change your username to something else. If its available, you can claim it.
4. Click the ‘Save changes’ button to confirm your new Twitter username.