@jmerwin Great question and we have had this brought up a few times. Currently there is not a place in iiQ that you can import the historical fee or item types. But our support team can get the dev team to help. If you can submit a support ticket our support team, they will gather all the data points that they need to get those imported for you. 

Also, i went ahead and submitted a new idea in our idea exchange for this enhancement. 

@jmerwin - Also make sure you vote for this topic as what you are asking for can be easily accomplished via a POST API call.