To talk about the QuickBooks activation errors when adding license and product numbers, you need to first understand what the license and product numbers are. Well, QuickBooks license and product numbers are basically the information that are a must for registering or activating QuickBooks, and you need to enter this information when trying to activate QuickBooks accounting software. In certain scenarios, you would come across the QuickBooks activation errors at the time of adding the license and product numbers, and in such scenarios, it becomes difficult to access the software. Thus, all you need is to keep an eye as to how you can get rid of such issues easily.