How do I get a copy of my 941 reports that Quickbook files?

Welcome back to the Community, @annerene.

In QuickBooks Online (QBO), once a form was successfully filed, a copy will be saved in the Archived forms section. You can view and print them by following these steps:

1. In QBO, go to the Taxes menu at the left pane to get to the Payroll Tax page.
2. In the Forms section, tick the View and Print Archived Forms link under Quarterly Forms. 
3. In the Archived Forms page, select Quarterly Forms, then pick 941 in the drop-down.
4. Click the 941 link, then View.

Just in case, I'll add this article for future reference: Archive old forms.

Please know that I'm only a post away if you have any other questions or concerns. I'll be here to answer them. Have a good one!