Hi, agnija. There are various reasons why your monthly income and total sum figures don't match in QuickBooks Online.
Before that, I would like to know more about what specific reports have you opened in QBO. This way, we can give out an accurate resolution.
Factors like the accounting method you selected while running this report, the reporting period, payments posted, and recorded deposits affect the total amount in a report. To avoid this kind of scenario, it's advisable to use the correct accounting basis to match your business's financial operation and ensure you've selected the correct reporting period.
I'm also adding this article that can guide you in customizing your reports and shows the data you need: Customize reports in QuickBooks Online.
Please don't hesitate to get back to us if you have other concerns about the difference in your monthly income and total sum. The Community space is always available for you.
