Archive task :-

1. Log in to your Orangescrum account using your credentials.
2. Click on the “Tasks” section from the left menu.
3. Navigate to Task Listing Page of specific project
4. Click  icon of the task.
5. Click  ‘Archive’.
6. It will show up a warning message asking to archive tasks. Click Ok.

Delete task:- 

1. Log in to your Orangescrum account using your credentials.
2. Click on the “Tasks” section from the left menu.
3. Navigate to Task Listing Page of specific project.
4. Click  icon of the task.
5. Click  ‘Delete’.
6. It will show up a warning message asking to delete tasks. Click Ok.