It is a simple method to change the username on Instagram. First, log in to Instagram, go to your profile, tap Edit Profile, select the Username field, delete the current username, enter a new one, and tap Done or Save (Android).
To change your Instagram username, go to your profile and tap Edit Profile. Select the username field, enter a new username, and tap Done (iPhone) or ✓ (Android) to save. If the username is taken, try adding numbers or underscores.
To change your Instagram username, go to Profile > Edit Profile > Username, enter a new one, and tap Save. If the name is available, it updates instantly.
Access your profile then tap on the "Edit Profile" option and write down your new username there. Create a special profile name that obeys Instagram's established rules. Tap "Done" to save changes.
Note - Users can update their username only once every 14 days.