If you need to mark a Task as blocked after you have created it, go to the details page of that Task and then follow these steps:
The Task is highlighted red on the Related tasks list of the User Story to which it belongs and on the TASKBOARD (if the User Story to which it belongs is part of a Sprint) to show that it has been marked as blocked – project members will still be able to perform actions on its details page. The reason of the block is shown on its details page under the Subject.
Note: To unblock a Task, go to its details page and, on the Sidebar, click .
There’s no way to link to another US, Tasks, Issue, or Epic? This is a pretty essential feature. Please add this feature in future versions.