Is it possible to setup sub-tasks to automatically be created when a parent task is created? If so, how?
There are a couple addons that provide this through a workflow post-function. Create a post-function on the "create" workflow transition and configure it to create the sub-tasks
https://marketplace.atlassian.com/plugins/org.swift.jira.cot
https://jamieechlin.atlassian.net/wiki/display/GRV/Built-In+Scripts#Built-InScripts-Createasub-task
There are some things you need to be careful with, see How to create subtasks on initial issue create.
It looks like you're new here. Sign in or register to get started.