Thank you for your interest in using QuickBooks Desktop for MAC, @steveo3279. I'll provide ways where you can see the upgrade costs.

You're right. There's no website where you can see the available products and prices. As per Fiat, you'll need to contact our Sales Team for guidance in finding the right one. 

You can click this link to start a conversation with them via chat or obtain the number to call: https://quickbooks.intuit.com/desktop/

Once done, refer to this article for the complete details of configuring the program: Install and set up QuickBooks Desktop for Mac.

If you need additional help with your subscription or organizing data, please let me know by adding a comment below. Have a good one!