If you don't have an old GNIB/IRP number you may uncheck it.
But if you do have you'd better to put it in which makes getting your appointment much faster.
If you're in urgent situation or accept close dates, please leave me an emergency contact so that I could reach you when the appointment is made for the same day or next day.
Leave me more message about you, such as what you expect, helps me offer better service.
If I cannot contact you, your application will not be proceeded.