1st - Chart prepare 4hrs before it reaches Boarding Station
2nd - Procedure for Cancellation of I-Tickets
Cancellation of tickets before departure of trains
Cancellation of I-Tickets can be done at any computerised reservation counter across the country and a cancellation ticket obtained. NO CASH REFUND will be given. Bank charges that are being levied by the Payment Gateways/Banks are not subject to refund...
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in the event of cancellation of tickets by the Customer. Service Charge is also not refundable. The refund amount will be credited to the respective account electronically, the following day of cancellation. Refund of fare shall be made after deduction of cancellation charge of the fare as follows:
If a RAC/waitlisted is cancelled then Rs. 20/- (Per Passenger) shall be deducted.
If a confirmed ticket is cancelled more than 24 hrs before the scheduled departure of the train, flat cancellation charges shall be deducted @ Rs.70/- for AC First Class/Executive Class, Rs.60/- for AC 2 Tier/AC 3 Tier/First Class/AC Chair car, Rs.40/- for Sleeper Class and Rs.20/- for Second Class. Cancellation charges are per passenger.
If a confirmed ticket is cancelled within 24 hrs and upto 4 hours before the scheduled departure of the train, cancellation charges shall be 25% of the fare subject to the minimum flat rate mentioned in the above clause.
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Cancellation of tickets after departure of trains
I-Tickets can also be cancelled in the above manner, at the boarding station, within 4 hours before the scheduled departure of the train and
Upto 3 hrs after actual departure of train for tickets upto a distance of 200kms
Upto 6 hrs after actual departure of train for tickets upto a distance of 201-500kms.
Upto 12 hrs after actual departure of train for tickets over a distance of 500kms.
In all the above cases, cancellation charges will be 50% of the fare subject to the minimum flat rate mentioned in the above clause.
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To cancel tickets after the above period
Surrender the I-Ticket with the Station Master and obtain a Ticket Deposit Receipt.
Prefer your claim for refund to the following address attaching the original copy of the Ticket Deposit Receipt:
General Manager/Operations,
Indian Railway Catering & Tourism Corporation,
9th Floor, Bank of Baroda Building,
16 Parliament Street,
New Delhi - 110 001.
IRCTC will process the refund claim with the Railway Administration and refund granted by the Railway shall be credited to your account.
Refund claims under above clause may require at least 90 days or more for processing.

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Cancellation of I-Tickets in case of trains cancelled
I-Ticket can be cancelled upto 72 hrs after the scheduled departure of train at any computerised reservation counter.
The above rules of Indian Railways are subject to change without prior notice