Hi there, 

I'd like to verify if you got a specific error or issue you got when accessing your QuickBooks File Manager so I can walk you through from there. Before we perform other troubleshooting steps, let's ensure to update your QuickBooks to the latest release. This makes sure you have the most recent fixes and security updates.

Then, you can access your File Manager in either of these ways: 

• In your company file, click the Accountant menu, select QuickBooks File Manager.
• From the Windows Start menu, go to Programs > QuickBooks > File Manager. Ensure that you access the latest QuickBooks File Manager installed.

You can use this article for more details: Learn the basics about QuickBooks File Manager.

Let me know if you have other questions. Take care!