Hello, @dd110.

You can set up your computer into multi-user mode if these computers are in the same office and networked (not wirelessly). I can walk you through on the process.

Let's first make sure that both computers meet the system requirements for the QuickBooks version you want to use. This way, we can avoid compatibility issues when installing the program and enabling the multi-user network. Also, determine which computer will you store your company files. 

Here's how:

1. Download the software to your through this link: Download QuickBooks Desktop.
2. Complete the download information and click Search.
3. Click the Download button.
4. Once the download is complete, the installation will automatically start. If it doesn't, double click the installer file to proceed.
5. Select Yes to All then hit Next.
6. Mark the Software License Agreement then click Next.
7. Enter the License and Product numbers, then hit Next.
8. Pick the type of installation you want and where you want to save QuickBooks:
   • I'll be using QuickBooks Desktop on this computer, AND I'll be storing
   • I will NOT be using QuickBooks Desktop on this computer
9. Pick a new install location or select Next to install to the default directory.
10. Click Install.

Once completed, you can set up folder permissions on your server computer. You can visit this article for the step-by-step instructions: Set up and install a multi-user network for QuickBooks Desktop.

Lastly, you can now map your network drive depending on your computer's operating system. This allows access to your company file even without an internet connection. Here's how:

1. Go to This PC.
2. Under Computer, select Map a network drive.
3. Choose one from your unused drive.
4. Select Browse.
5. Go to the location of your QuickBooks company file.
6. Click OK and then Finish.

You can map a network drive for your company file. In addition, I've included our detailed guide in mapping a network drive for your company file. Also, here's an article you can read to learn more about activating multi-user mode: Host your Company Data File in Multi-User Mode.

Feel free to leave a comment below if you have any other questions about multi-user mode. It'll be always my pleasure to lend a hand.