I'll share some details about the Statement of Activity by Month, houston.

The option to exclude the subclasses when running a Statement of Activity by Month isn't available in QuickBooks Online (QBO). What we can do is export the reports and modify them by excluding the subclasses. Please refer to the steps below:

1. On your Statement of Activity by Month report, click the Export icon. 
2. Hit Export to Excel.
3. Save the file somewhere you can easily find.
4. Open the report and exclude the subclasses column.

Also, I'd suggest sending your comment about this functionality to our Product Development Team. Here's how:

1. Select the Gear icon, then choose Feedback.
2. Enter your comments or product suggestions.
3. Hit Next to submit. 

To learn more about saving the current customization setting in your reports, check out this article: Memorize reports in QuickBooks Online.

I'm always here to assist whenever you have further questions about customizing your reports. Just add a reply below. Stay safe!