Is there a monthly sales income ONLY report?

Thank you for posting in the Community forum, @toscha1.

In QuickBooks Online (QBO), you can pull up the Sales by Customer Detail report and filter it to monthly. This will show your sales grouped by the customer which includes the date, type, amount, and total.

Here's how to run the report:

1. In the left menu, click Reports.
2. Type in Sales by Customer Detail in the search field. 
3. Set the Report period to monthly. 
4. Hit Run report. 

For additional information, you can check out below helpful article:  

• Run reports
• Customise reports in QuickBooks Online

If I can be of further assistance, let me know by commenting below. I'm just one click away. Have a great day.