How do I change my business name? 

To change your store or business name,

1. Tap Account at the bottom of your app home screen.
2. Tap Business profile.
3. Tap the edit icon next to Business Name.
4. Add or change the display name and tap Save Changes.

Note: If you face any issues while adding or changing the display name, please check that you are using the latest version of the PhonePe Business app.

Related question(s):
How do I update my contact details or business address?