If you have booked a ticket on Turkish Airlines, but want to cancel for personal or urgent reasons, you can use Turkish Airlines cancellation policy to cancel. Customers can enjoy great benefits by taking advantage of Turkish Airlines risk-free 24-hour cancellation policy, which allows cancellations within 24 hours of original purchase on the same day with no cancellation fees. In doing so, the customer will be entitled to a full refund if the ticket is booked more than 7 days prior to the scheduled departure time of the flight. Refundable and non-refundable tickets are fully refundable if canceled within 24 hours prior to departure.

https://www.cancellation-policy.com/turkish-airlines-cancellation-policy