Changing GL accounts for Service Offerings

In Flex 4 there was a "GL Account" tab next to the "Pricing" tab when in an opened service offering. That tab doesn't exist in Flex 5. How to I change those GL accounts now for those offerings? It does exist within the inventory item section, but not within a service offering, such as "Audio Engineer". I need to change my accounts as of this week and without Flex 4 now, I can't do that. 

Thanks!