You're correct, @kent7. Adding or changing the user access in the QB Desktop app is an admin-only option. Let me provide further details about this.

In the QB Desktop App, there isn't an option for single/multi-user. However, the administrator of the account can add multiple users depending on the subscription. With this, all the users can access the QuickBooks Online (QBO) company at the same time.

The administrator can add users through the Manage users page. Then, select the type of access they'll provide to them. Here's how:

1. Go to the Gear icon.
2. Select Manage users. If you can’t select this, you don’t have permission to manage other users. Contact an admin user for help.
3. Select Add user.
4. Choose the user type you want to create. 
5. Click Next.
6. Enter your new user’s name and email address.
7. Click Save.

I've attached screenshots below for your reference.

After that, the new user will receive an email invitation from us. Then, let them select the Let's go! link in the email so they can sign in or create an account.

To learn more about the different user types and levels of access in QBO, you can refer to this article for the complete details: User types in QuickBooks Online.

Additionally, with the QuickBooks apps, you have the power of QBO with the speed you expect on your desktop. Here's an article that provides the list of tasks you can perform using the program: QuickBooks App for Windows and Mac: General support.

Please let me know if you have other concerns. I'm just around to help.