Thank you for posting here, @MBConslt.

Currently, the option to collapse sub-class from parent sub-classes when running a report is unavailable. As a workaround, you may export the report to excel and edit the columns from there. For more info, please see this article: Export reports as Excel workbooks in QuickBooks Desktop.

I can see the importance of having this option added when accessing the report by class. I’ll take note of this and send feedback to our Product Development team. Rest assured that we are bound to help you with everything we can. 

Also, to be updated for new release components and features of the program, visit our Firm of the Future blog. This focuses on improving the QuickBooks user's in-product experience. 

Please let me know if I can be of additional assistance or should you have any follow-up questions about managing sub-classes in QuickBooks. I’ll be here to help. Have a good one.