My desktop is telling me that I dont have permission to connect to the remote computer.

Can you share screenshot of the message? Why did you need to remote to other machine to access QB Online? 

Let me help you get through with this error, @seaviewm.

There are the things you're required to do in accessing QuickBooks Desktop remotely to a host or server computer.

• Map Server or Host computer as a network drive to your individual workstations.
• Set up computers that will be accessing the files for multi-user mode.
• Set the folder where the company file is stored.

Once done, you'll have to install the QuickBooks Database Manager on your remote computer for multi-user access configuration. Here's how:

1. Download & Install QuickBooks Desktop on the main computer.
2. Go to the File menu then choose Switch to Multi-user Mode.
3. Choose Yes in the Multi-user hosting setup required window.
4. Click OK on the Multi-user setup information window.
5.  Add the necessary users by going to Company and selecting Users. Then Set up Users and Roles and select New.

Second, turn on network discovery and password sharing off to access QuickBooks remotely over the network. You can check this article for more additional information on how to access QuickBooks Desktop remotely: Open a company file located on a remote computer.

Fill me in if you've more questions. I'm around to help you achieve your goals. Take care always!