A KTN (Known Traveler Number) is a unique number that's issued by government institutions to help you get through TSA Pre-Screens more quickly.
To add your Known Traveler Number:
Login to you Whereto account.
Select your name in the top right corner.
Select My Account from the drop down menu.
Scroll down to the bottom of the page to the section under Traveler Information
Enter your KTN in the field, and click the Save button at the bottom of the page
Still having trouble? Feel free to reach out to our customer support team for further information.