There are two ways by which you can edit the sub-task
From Task List page:-
- Navigate to the task list page of the project.
- Click on the 3dot menu next to the task you want to edit and select the Edit option as shown in the image below.
- Make the required changes to the task.
- Click on Save.
From the task detail page of Parent task:-
- Please click on the task title of sub-task which you would like to edit. It will take you to the task detail page of the subtask.
- Click on to edit the task.
- Once all changes are made, please click on “Save” at the bottom of the task edit page.