To receive TSA PreCheck in 2026, you must complete a four-step application process that includes an online application, an in-person appointment, a background check, and fingerprinting. First, you visit the official TSA website to submit an online application and pay the non-refundable fee (approximately $78–$85 for five years). After applying, you must schedule a 10-minute in-person appointment at an enrollment center to provide proof of identity and U.S. citizenship or lawful residency. Once your background check is processed (typically within 3–5 days, though it can take up to 60), you will receive a Known Traveler Number (KTN) via email or mail. To actually use the service, you must manually add this KTN to your airline profile or individual flight reservation; this ensures the "TSA PreCheck" indicator appears on your digital or paper boarding pass, allowing you to use the expedited lanes where you can keep on your shoes, light jackets, and belts.