To close the task, do the following:

1. Go to the Schedule section.
2. Select the task you need to complete.
3. Click the Edit button.

4. Go to the Action State section and click on the Completed status.

5. Click the Save button to save changes.

As a result, the task color in the schedule will change to green.

Note: Users can't edit or delete completed tasks; they can only view the task card.