Hi @hdsds19,

I got your back on your query about the classes feature.

At this time, assigning a default class to a customer is unavailable in QuickBooks Online (QBO). What you can do is set a default class to a product or service.

Here's how:

1. Highlight the Sales tab.
2. Select Products and Services.
3. Choose a product or service on the list, then click the Edit link on its right side.
4. On the pop-up window that appears, assign a specific class under the Class drop-down menu.
5. When finished, hit Save and close.

If you want to track classes per transaction instead, see this article: Track your transactions by class. Scroll down to the Change how you tag a class in customer transactions section for the steps.

Have other questions in mind? Post them below, and I'll get back to you as soon as I can.