So my Asana is using the Trial Premium plan, but I don’t see the “Add Field” button under Customize menu.
I would like to add the Priority field and sort tasks based on it.
Hi @Dendy_Armandiaz_Aziz, welcome to the Asana Community Forum 
Could you please confirm if you are a Member or a Guest in the Organisation? At this time, only Members can create Custom Fields, it is not possible for Guests to do so.
Looking forward to hearing back from you 