You can find out what products were sold with or without tax using the Sales by Product report.
- Hit the Reports tab and select Inventory from the sidebar. Click on Sales by Product.
- Set the report to the date range you are looking for.
- In the Filters section, locate the Tax dropdown menu and select either "Non-Tax sales" or "Tax sales."
- Select Go! to generate the report.
To learn more about the Sales by Product report, click here.