Where do I see maintenance falling due?

1. The Dash lists a plan not booked once its test is a fortnight away, in red once it is past due, with Book it.
2. The Calendar shows each plan still to book on the day its test falls due. Press it to open the plan on Maintenance, Due.
3. Reports, Maintenance due lists every running plan due by the end of the period you pick, late ones first, and downloads it.