To cancel an e-ticket, you’ll need to access the IRCTC website or app and navigate to the “My Transactions” or “Booked Ticket History” section. You can then select the specific ticket you wish to cancel and choose the passengers to be cancelled. Confirm the cancellation on the pop-up message, and the refund amount will be displayed. A confirmation message will be sent to your registered mobile number and email address. Remember that cancellation charges may apply depending on the time of cancellation relative to the train’s departure.