How do I mark one task as blocking another?

Open the task and go to the Related tab. Click Add Blocker to choose a task that must be finished first, or Blocks to choose a task that is waiting on this one.

Steps

1. Open the task and click the Related tab.
2. Click Add Blocker (this task can’t be completed until the other task is), or Blocks (the other task can’t be completed until this one is).
3. Type part of the other task’s title or ID in Search tasks by title or ID….
4. Click the task in the results.
5. To remove a link, hover over it in the list and click the X.

Good to know

• The Related tab has three sections: Blocking This Task, Sub-tasks (Auto-blocking) and Blocked By This Task.
• A task can’t be marked Completed while any task blocking it is still open. This applies on the task page, the List View, the Board and bulk updates.
• Sub-tasks block their parent automatically. You don’t need to add them as blockers.
• You can only link tasks you have access to, and a task can’t block itself.