Yes, @SpCadet. QuickBooks Desktop (QBDT) 2021 works well with Sonoma. Allow me to elaborate and clarify your confusion. 

QBDT 2021 is designed to work seamlessly with Sonoma, offering users the ability to integrate their accounting processes with Sonoma's business management platform. It's important to note that while QuickBooks Desktop 2021 is fully compatible with Sonoma, it is no longer supported for integration with older versions such as 2019 and earlier iterations of QuickBooks Desktop. 

That said, to leverage the benefits of Sonoma's integration with QuickBooks, users are encouraged to upgrade to QuickBooks Desktop 2021 or a supported version to ensure optimal functionality and compatibility. This upgrade will not only provide access to the latest features and improvements but also ensure a smooth and efficient integration with Sonoma for streamlined business operations.

Also, feel free to browse this guide for more information on managing your QuickBooks Desktop for Mac: QuickBooks Mac Plus User’s Guide.

If you have any further inquiries regarding this or require assistance with upgrading your QuickBooks version, please don't hesitate to ask for more information.