It would be good if we are able to create a subtask to an existing task.
Thank you for the feedback!
As an update, we’d like to pursue improvements to the checklist functionality in Planner, but don’t have any near-term plans.
If you’d like to vote on task dependencies/linking/referencing, please head over here: https://planner.uservoice.com/forums/330525/suggestions/13976094
We will keep you updated when there are any changes. Keep the votes coming and comments coming!
The Planner Team
Shaun Schanbacher commented
Yes!!!! Task linking / dependencies would be huge!
Jeremy Colson commented
Absolutely agree... We need some way create subtasks (linking the cards perhaps).
Lee Cashion commented
This one is Huge. We tend to have tasks from multiple departments that will depend on members of other department/teams. We were looking to build a very similar app with the task linking features.