Thanks for your interest with knowing how our products work, @billcx,

You can install QuickBooks on a second computer if you're not using payroll. Installing a single license of the program while using payroll will create problems. Also single licenses can't be set for a multi-user system. 

If you want other people to access the same file, a hosting service will work. This will help users remotely access your PC away from your desk. We have an app website where you can find hosting tools to help you. See this: Apps for QuickBooks Desktop 

We also have a separate forum called Intuit Developers, where you can find engineers who can help recommend third-party hosting applications to use. Click this link to our website: Intuit Developers Community.

If you need further help with anything in QuickBooks Desktop, let me know in the comment section. Have a nice day!