We have done something similar for alerting.
What you need to do is to make sure you save the item as a custom variable and use the API: “Create an Object” action not the workflow “Create Autotask ticket”
You then want to create an entity of Type “Ticket” and add all the Mandatory fields as well as Issue, sub-Issue, Description, Queue and InstalledProductID
The 2 items you then use to match it up are:
InstalledProductID: {{custom.Config_Item.id}}
AccountID: {{custom.Config_Item.AccountID.id}}