I can help you download QuickBooks Point of Sale (POS) and set up multi-user from it, Ga-i International.
Let's make sure you meet the system requirements for POS before installing it on your computer. If you met the requirements, you can follow the steps and details in the Download QuickBooks Desktop Point of Sale article to install the software.
Once done, follow the steps in the Set up folder permissions section to set up a multi-user environment. Just check out this article for the details: Multi-user setup for QuickBooks Desktop Point of Sale. Then, proceed to Step 2 to Step 4 to finish set up.
If you need further assistance, please contact our QuickBooks POS Support Team. Just click this link to reach out to them: https://community.intuit.com/browse/payments-contact-us. Then, go to Point of Sale section to view the contact number.
Please reply to this post if you need anything else in QuickBooks POS. I'm here to help.