You can add baggage and manage your booking on the Thomson website (Your Booking reference is on the 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 Thomson don’t offer it on your route. Please note that as a back-up on all routes, Thomson offer airport check-in, free of charge.