Defaulting the Class column on the report is a great idea, BK_No10.

You can send feedback about this feature to our Product Team. Here's how:

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I'm also adding this article to get the statement that you need for your business: Learn how to run reports by class in QuickBooks Online Plus.

Keep me posted if there's anything else you want to do with your transaction report. I'm always right here to provide the information that you need.