Welcome to the Community, @Ians9701.
At this time, opening an accountant's copy should match the version of QuickBooks Desktop (QBDT).
If your accountant has an older version of QBDT, they'll need to upgrade it to a newer version to open the accountant's copy. QBDT depends on the compatibility of the company file.
However, your accountant can still work on the Accountant's Copy using a different version as long as the gap between the versions is just one year.
I'm adding these articles more for information:
Please let me know if you need further clarification about this, or if there's anything else I can do for you. I'll be standing by for your response. Have a great day.