AS to add OF subtask to existing task in a specific project?

Hi! I’m trying to adapt Joe Buhlig’s OmniFocus autoparser script to simply dump all email order confirmations from Amazon into my “In Shipping” project.

I’m bumping up against the syntax to use to get a new task created as a subtask. From this script:

if taskName starts with “Fwd: Your order” then
set taskName to ((characters 11 thru -1 of taskName) as string)
set taskNote to note of currentTask
set taskText to taskName & " " & taskNote
set newTask to parse tasks into with transport text taskText with as single task
delete currentTask
end if

How do I change the newTask line to create a subtask in a task called “Amazon” in a project called “In Shipping”? Is this even possible? Thanks in advance for the help!!!