Hello, I work on QuickBooks Desktop for Mac. The development team on QuickBooks Mac monitors all new macOS releases and tests all supported versions of QuickBooks Mac against the available beta versions of that OS in the months leading up to the public release. After Apple officially releases the new OS (we learn the release date at the same time as you) we have to again test and qualify everything - as there are often last minute changes between the pre-release and release versions of the OS that also need to be accounted for and may cause different issues across the different product versions that require diagnosing, fixing, and retesting - before we can ship out any needed updates. Our team is working to provide a stable and positive experience to our users who want to upgrade to the newest OS. We focus on providing support for OS upgrades as close to the public release dates as the testing allows, but can only make the claim of compatibility for a version of the product once we have tested thoroughly and have completed delivery of the update for any needed changes, however major or minor those changes might be. Unfortunately we can’t pre-announce exact dates but thank you for asking about compatibility now instead of immediately upgrading to the new OS and potentially encountering issues that could interrupt your workflow. We are working to provide all users on supported versions an officially compatible QuickBooks Mac on Monterey ASAP. I do understand the frustration that comes from waiting for verification of OS compatibility with QuickBooks Mac and/or an update, and that is on our minds as we are working quickly to complete all the checks and testing needed so we can officially get your software supported on Monterey. Others have provided links to check on the most recent updates, and I’ll check back in here with you as soon as I can give you a better answer. 

Please let me know if there are any other questions or concerns. You can also contact the development team from QuickBooks menu > QuickBooks Feedback. We read and track everything, and take any suggestions under consideration as we work to help support you and all of our other QuickBooks Mac users.