You can add baggage and manage your booking on the TUI website. (Your booking reference is on the email confirmation we sent to you when you booked).
You will be able to add your passport information, reserve seats and add baggage (within 90 days of departure) check in* and print your boarding passes.
Click here to Manage your booking.
*If you’re unable to check-in online, it may be because TUI don’t offer it on your route. Please note that as a back-up on all routes, TUI offer airport check-in, free of charge.