Hello AngG,

Welcome to the Community.

The answer of @leann3 is a great help to keep track your expenditures and revenues. I'll just add a little more about class tracking in QuickBooks Online. This feature is only available in the Plus version, and you'll have to turn it on in the company settings. 

Here's how:

1. Click on the Gear icon.
2. Select Account and Settings.
3. In the Advanced section, select Categories.
4. Check the Location and Class boxes.
5. Click on Save.

To learn more about it, please check out this article: Using Classes and Locations in QuickBooks Online.

Here's a list of reports available: Available Reports in QuickBooks Online.

If you have any questions, please let us know. Thanks!