Click on the clock icon in the main menu and then on Vehicle due dates.
The number in the red circle indicates the number of expiring or expired due dates, and if there are none, no number appears.
The list opens sorted by the Due Date field, filtered to show only the expired due dates and the due dates expiring in the next 30 days.
The due date is colored red if it has already expired, in orange if it is expiring, and in black otherwise.
Remove the filter on the due date by selecting Show all in the options at the top, or put it back by selecting Expired and expiring in the next 30 days (default option.)
Click on the red bell or the orange bell at the end of each row to remove the notification for that due date.
If the due date is set to repeat, it will be postponed for the specified time, otherwise it will be simply removed.