Your Tasks on your To Do Lists come with seven default Task fields: Priority, Tag, Start, Finished, Status, Assigned, and Due. These are the default names of these fields, but you can also customize the names to fit your needs. You can also choose to hide the Task fields that you aren't using.
To learn how to customize your Task field names follow the steps in the image below:
Once you have saved your new Task field names they will appear every time you open the Task editor. If you want to go back to the default settings for your field names all you need to do is click on the yellow "Reset to default settings" button in this screen.