How do you create a Budget to Actual report filtering by Class in Quickbooks Online?

Welcome to the Community, @jbaxter-uvacswim. 

Let me share with you some information about the Budget vs. Actual report in QuickBooks Online. 

You'll need to create the budget and make sure to set a class. This way, you can include the Class option in the Filter section. 

From the budget creation page, there's a drop-down under Subdivide by, choose the Class. Without this step, your Budget vs. Actuals report would only show Account as a filter option. 

There isn't an option to change this on an already saved budget, so I suggest creating a new one. 

Once done, you can now run the report and make sure that you select the appropriate budget from the Budget section. Here's how: 

1. From the left panel, click Reports.
2. Search for Budget vs. Actuals.
3. In the Budget section, select the appropriate budget with the Class.
4. Click Run report.

I've added a screenshot below for your visual reference. 

You might also want to read this article to learn how to manage budgets.

Take a quick look at this article to customize your financial reports in QBO: Customize your financial reports. It includes the steps on how to run and customize reports, along with how you can show specific accounts.

Let me know if you have any other questions about the budget vs. actual by dropping a comment below. I'll be sure to get back to you.