Hi linda1747,
Thanks for reaching out to us here. QuickBooks Online has a substantial list of reports, that you can customize, to see what matters most. I would be happy to guide you to the best fit, for viewing your monthly sales!
Follow these steps to view the Sales by Customer Summary report;
1. Open Reports from the left menu
2. In the Search field, enter Sales by Customer Summary
3. Choose the Report period
4. Use the ▼ dropdown to Display columns by Months
5. Hit Run report
You're all set!
If you have any other questions, feel free to reach out again. We would be glad to help!
