Hello, Amy M.B.
Welcome to Microsoft Community.
The point is actually that you do not have the permission to edit this document directly, not how to turn off the reviewing, editing, and view feature. May I ask whether this file is shared with you by someone else? If so, you need to contact that person to remove the editing restrictions against you, otherwise no one else can remove the read-only restriction from that document.
If this document is encrypted with password by yourself, then you need to decrypt it. After decryption, you can edit it directly, and it doesn't matter if you turn off the reviewing, editing, and view feature or not.
Feel free to reply if you have other concerns.
Best regards,
Yuhao Li| Microsoft Community Support Specialist