Hello there, @Blueishmango.
Creating a backup copy or a zip file for the specific date range is currently unavailable in QuickBooks Desktop (QBDT).
I understand that you want to provide 3-years of backup data to the auditor. However, QuickBooks will back up all the data on your company file.
While this option isn't available, I suggest submitting feedback directly to our product engineers. They may look into this suggestion further and consider adding the option in QBDT. To submit feedback, you can go to the Help menu and select Send Feedback Online. Then, choose Product Suggestions and enter your feedback.
You may also want to visit our blog site so you'll be able to get the latest news about QuickBooks and what our Product Care Team is working on.
Please touch base with me here for all of your QuickBooks needs. I'm always happy to help.
