Look no further! I can help you find and update your category list quick as a wink, @matthew27.
Can you clarify which categories you are referring to? This might apply to Ledger Accounts, Classes, Product/Service categories, etc. Anyway, you can access all your lists on the All Lists page.
- Go to the Gear icon.
- Select ALL Lists.
- Click the list you need to edit.
If you're referring to the categories available to select for bank transactions (i.e. Ledger Accounts), check out this link: Add to or edit the Chart of Accounts.
Also, here are some helpful resources you can use in organizing your lists in QuickBooks Online:
Please touch base with me here if there's anything else I can do to help you out. Thanks for coming to the Community and take care.