E-Tickets can be cancelled only through BookMyTrain's website or through the app till Chart preparation of the train and it is not allowed at face to face Railway Counters. If the user wishes to cancel his e-ticket, he can do so till the time of chart preparation for the train (which is normally 4 hours before the scheduled departure of the train from the train starting station). He can log on to www.bookmytrain.com and go to Booking History link and select the ticket to be cancelled and can initiate the cancellation by selecting the passengers to be cancelled. Cancellation would be confirmed online and the refund would be credited back to the account used for booking in case of electronic payment & to the specified bank account in case of Cash On Delivery. If there is any partial cancellation of ticket please ensure that the modified ticket (Electronic Reservation Slip) is printed separately.
Post the preparation of the charts, the cancellation can only be done through filling a TDR. The terms of cancellation are same as IRCTC. The money will be credited to your respective bank account as mentioned above.