I can help you with that, luz-ossa.
We can pull up two separate reports. First, run the Sales by Product/Service Details report. This report shows our sales, grouped by product or service.
Next, pull up the Invoice List report. The report displays the amount received after applying the discount.
Once done, you can combine these reports and export them to Excel to get the information you need.
That should do it! I'm including customize reports in QuickBooks Online for future reference and guide.
Tag me in a comment below if you have any other concerns about running reports in Quickbooks. I'm here to help.