At this time, QuickBooks Desktop (QBDT) for Mac doesn't fully support Big Sur. It will open, but you might experience some unexpected behavior.
I can see how this feature would be beneficial to you and other businesses. While we continue to make your experience with us even better, in the meantime, I encourage you to star our blog to keep up with any product updates or improvements: QuickBooks Blog.
Additionally, I want you to get the most out of QuickBooks for your business. You can check some articles that are designed to help you get acclimated to the software. They can be accessed at the following link: QuickBooks Tutorials.
As always, you can get back to me if you have any additional questions. I'm here for you. Have a great day!