Once you've made your booking, you can access it at any time by logging into your NUCO account here.
After logging in, click the link in the top right-hand corner of the page to open the menu, then select "View Bookings". This will display all of your bookings.
Simply click "View This Booking" next to the trip you'd like to view to open your booking summary, where you'll be able to see your booking details, make payments, manage your options, and more.