Can I run a report on how much a customer spends each month?

I'd be glad to help you get the data you need, bulldogsupply1.

You can definitely run a sales to check how much has the customer spent on a monthly basis. I'd be glad to share these steps with you:

1. Go to the Reports menu.
2. Look for the Sales by Customer Summary report.
3. Click the drop-down list for Display columns by, then select Months.
4. Select Run report.

Do you also need extra references when running report? If so, feel free to check out these articles that I'll be sharing with you:

• Customize Reports in QuickBooks Online
• Export Reports, Lists, and Other Data from QuickBooks Online 

Post more questions or reply to me if you need anything else. The Community is always ready to offer our help again.