Hi @Jed_Levene!
I know we spoke recently about Flowsana (I told you on the call that I knew I’d see you again on the forum!) - what you’re describing here is something we didn’t cover when we spoke, but you could use the Flowsana “Add subtasks from a template” If-Then Rule in conjunction with the CSV info that Emily provided. If you import the tasks via CSV, you could have a Flowsana rule that when a new task is added to that project, add a set of subtasks to it from a specified template.