You can log out if your personal Apple ID and log in with one for your business use.
- You need to log off in 4 places.
- Go to Settings ➡️ Apple ID and scroll all the way to the bottom and tap Sign Out.
- Go to Settings ➡️ Messages ➡️ Send & Receive ➡️ Apple ID and sign out.
- Go to Settings ➡️ FaceTime ➡️ Caller ID ➡️ Apple ID and sign out.
- Go to Settings ➡️ Apple ID ➡️ Media & Purchases ➡️ Sign Out.
- Repeat the process to sign in with a different Apple ID.
The link provided by razmee above will just let you change the email address for your existing Apple ID , which is probably not what you want to do. As it will continue to be the same Apple ID, and everything would still be linked as it is now.