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.