How do I see amount of products sold to individual customer in reports ?

Good morning, dkjohnston11, and welcome to the Community.

I'd be glad to answer your question about customer reports in QuickBooks Online.

Here's how you can view quantities of products sold to individual customers:

1. Click the Reports tab in the left navigation menu.

2. Enter Sales by Customer Detail in the Search field.

3. Make any changes to the date if desired.

4. Choose the Customize button in the top right corner.

5. Select Filter, then Customer.

6. Choose which customer you'd like to view sales for then click Run report.

With this report you'll be able to view the quantity of items sold, along with other detailed info for any customer. Additionally, the following article provides even more info about customizing reports in QuickBooks Online. Please feel free to reach back out if you have any other questions.