I can show a way of knowing which product region we're using, adwbkk.
When we purchase QuickBooks, it'll only show the available product that we can use. We can check the purchase information.
Within Quickbooks, we can check the Sales Tax company preferences instead of looking into the Product Information window. This is to see the tax codes of each region.
I've added a reference that we can use in getting started with QuickBooks Desktop. It'll help us in setting up our company preferences.
Let me know if you need anything else. Thanks!