There is no built-in business report available by Sales Rep in new QBO at this time. By using available custom field on the sales forms (invoice and sales receipt), you can easily get the information by selecting and customizing standard built-in “SALES BY CUSTOMER SUMMARY” report.
This quick and easy tutorial video shows you how to customize sales report by sales rep for tracking sales and manually computing sales commissions in the new QuickBooks Online (QBO).
Here is another top-rated tutorial video by VPController for newQBO.com. We encourage you to watch the entire video.. You do not want to miss a step!