Yes, you can, MFS2024. I'll gladly walk you through the steps below to purchase the QuickBooks Desktop (QBDT).

Your QBDT Pro allows up to three users to work in the same company file. Please follow the steps below to complete the process:

1. In QuickBooks, go to Help.
2. Select Manage My License and Buy Additional User License. If Buy Additional User License isn't available, your QuickBooks already has the maximum number of users.
3. Choose if you want to buy licenses online or by phone. Follow directions on how to add user licenses.
4. Install QBDT on additional computers based on the number of licenses you have.
5. Use the same license and product numbers you have to install QBDT.
6. After you install, follow the prompts to activate the QBDT program.

Once done, proceed to the Sync your license data section of this article to update your new license info: Add a user license to your QuickBooks software.

Moreover, you can consider setting up a private cloud environment, especially since you want to avail additional user licenses. You'll only need internet access to let every user handle your company file while using SDK to access QuickBooks. Refer to this article to set up a hosting environment: How to host a QuickBooks Desktop company file.

Kindly notify me how it goes after adding a user license by leaving a comment below. I'm always ready to circle back and provide you with the necessary assistance you may require.

This is true.  However we are a small business and the Online version is miserable.  I finally tried it for 20 minutes and cancelled immediately.  It's purpose is for being able to send your work out online.  Intuit hires people to work as a Quickbooks Pro Advisor and bookkeeping...BUT you are forced to use QB Online.  They make you fear you will no longer have support.  Its not that won't support problem shooting but rather that they won't come out with additional updates or fixes.  QB Desktop 2024 will be it.  If you have it already, you're good.  If you want to purchase it....not so lucky.  BUT, just use your older version.  In addition Payroll features were focused through Online as well.  However, you can set up Payroll manually in Quickbooks Desktop even if you didn't purchase Payroll.  I am a bookkeeper with 40 years experience.  I would love to work for people doing their books and would even be willing to go through Quickbooks.  But they only want to talk about Pro Advisor, Sales, those type things.  Testing and classes.  I simply want to find clients on my own or via Quickbooks.  I don't mind being an employee.  

The subscription is for their support.  You already have the program and don't need to buy it again.  Just use it.  There are people who will continue to help with issues if you have any.  Some may be high and some may be exploiting, such as the people offering to sell a lifetime license.  There isn't a lifetime license on support because support means producing another version with updates and fixes.

You can still purchase QB Desktop Accountant and Enterprise. If you use QB Desktop Pro Plus or Premier Plus, you cannot purchase the Enhanced Payroll subscription any longer but you can use a third-party payroll application to integrate with your QB Desktop. You can check the following blog for reference.

https://www.fiatlux.co.id/single-post/quickbooks-desktop-after-september-2024-what-next

I have 4 clients using Desktop as old as 2017, 2018 and 2021 - they just don't import.

@KaseyNJ 

Do they need to convert data to QBO or have other concerns?

I agree with you. I don't use payroll so I don't need table updates. The software really hasn't changed in the last 10 years, but they want to put you on a subscription basis. CASH GRAB, and no added value to the consumer!