You can view, create, complete, and edit reminders from the Reminders app right in Calendar.
You can show scheduled reminders you added to the Reminders app on your iPad.
Tap on your iPad.
Tap the circle next to a reminder’s name.
Complete reminders are dimmed. Deselect the circle next to a reminder to mark it as incomplete.
Note: If you set a scheduled reminder to repeat, future instances are dimmed and can only be marked complete after the most current instance is marked complete.
Go to the Calendar app Add or remove accounts in Reminders on iPadEdit and organize a list in Reminders on iPad