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Launch the **TikTok** app on your mobile device and log into your account if you haven't already.
Tap on the **Profile** icon located at the bottom right corner of the screen to access your profile page.
On your profile page, tap the **Edit profile** button to access your account settings.
In the edit profile section, find the **Username** field. Tap on it and enter your desired new username. Make sure it complies with TikTok's username guidelines.
After entering your new username, tap the **Save** button to confirm the change. Your username will be updated immediately.