Creating child tasks from Email Submission

I’m probably missing something very simple.  I’ve got a Smartsheet form being sent in from a specific email.  I’ve got email routing that looks for the email + specific subject, it uses the proper template.  That was easy.  I want to write some simple logic that looks for specific text in the body, and if it sees it, creates a task inside the already created ticket and assigns it to the proper people.  I can’t seem to get that to function.  Anyone have any ideas?