In order to schedule a reminder for a task or a subtask, please firstly tap on the task’s or subtask’s title in the list or create a new task or subtask. On the 'New/ Edit' screen, please tap on the 'Reminder' option, then make sure that the toggle for the 'Remind Me' option is turned on in the ‘Due Date’ section, you can then choose the date and time for your reminder. You can also set up a start date reminder for your task or a subtask in the ‘Start Date’ section.