If you have a task in your To Do List that you'd like to copy, you can do so by clicking on a Task in your list and then clicking on the "Copy" button at the bottom of the Task Editor. This will create an identical copy of your Task including any notes, links, dates, repeating schedules, etc. that you've added to the original Task.
Once you have clicked on the “Copy” button a new Task Editor with a copy of your Task will appear on the screen. With the new Task Editor window open, you can change the date, time, or anything else you need to modify in your new Task but without having to start over from scratch. To save the copy of your Task you will need to click on the “Create Task” button in the Task Editor and the copy of your Task will now be saved to your To Do List.
Follow the steps in the image below:
Learn more about how to make a copy of an entire To Do List.