In the Instagram mobile app, go to your profile.
Tap Edit Profile
Scroll to the bottom and tap Switch to Professional Account at the bottom.
When given the option between Creator and Business, tap Business and Next.
Review your business information and tap Done.
If you are unsure if your account is a personal or professional account, head to your Instagram profile in the application and tap Edit Profile. If you do not see the option Switch to Professional Account at the bottom, then your Instagram is already a professional account.