I am getting an error message that says "QuickBooks already has a company file open. " no file open?I am new to QuickBooks desktop pro

Are you using QB Online or QB Desktop?

Take a screenshot and click the camera icon on the menu to insert the error message here. 

Hey userwendymcd,

Thanks for reaching out to us here. Getting you the support you need is important. I would be happy to point you in the right direction for the best assistance possible.

In order to better assist you, I recommend reaching out to the support team outside of the Community as we may need more information from you. They'll be able to verify your account details in a secure setting, as well as view your screen and guide you to your QuickBooks goals. You can reach them by following the method in this link.

If you have any other questions, feel free to reach out here.