Hello there, @Robman.

I appreciate you for getting back to us here in the Community. I can provide some clarification about the categories in QuickBooks Online.

You can use the class tracking feature to categorize products and services from your transactions. I recommend selecting the One to each row in transaction option to add a category to each line.

Please see screenshots below for your visual guide:

I've also attached an article you can use to classify your products and services, as well as some information about class tracking:

• Group your products and services into different categories.
• Turn on class tracking in QuickBooks Online

Fill me in if you have additional questions about using QBO. I'm always here to help. Take care always.