Transition Sub Task from Parent issue

[Jeremy Price]

How do I have my sub task automatically transition into the "done" status after I transition my parent task issue into the done status? 

I have the Automation add-on but I'm confused when I get to the copy from parent selection or which JQL I should use for the sub task. 

[Jeremy Price · Accepted solution]

Had to use the branch rule inside of the Automation add-on.