Hi, JS047.
To see the Manage Categories option, ensure to log in to your account as the master admin. If not, request the admin of your QuickBooks Online account to change your access to the file.
However, if you're the admin of the account and aren't seeing this option, I highly recommend contacting our QuckBooks Support Team. They can take a closer look at this to determine what's causing the issue.
Once everything's fine, you can check this article for more information when categorizing products and services: Group your products and services into different categories.
Feel free to check out these guides for more information about managing your products and services in QBO:
Let me know if there's anything else I can help you with categorizing your products and services. Don't hesitate to click the Reply button, and I'll get back to you.
