Welcome to the Asana Community Forum @Heidi_Eng 
What plan are you on?
Asana has made changes to the subscription tiers and ai features are only included with the new ones.
This means if you were on the previously called “Premium” plan you would have to change to “Starter” or if you were on the “Business Plan” you would have to change to “Advanced” in order to get access to all AI features.