Tatkal Reservation as you know is a facility arranged for last minute travelers and is offered only as first come first served basis. You can book Tatkal tickets in the IRCTC official website www.irctc.co.in. You can book Tatkal tickets for all the classes except for First class AC, Executive class and also Ladies quota. Better go through the Tatkal reservation rules before you start booking.
Tatkal booking is possible in all classes except First class AC and Executive classes.
Tatkal tickets can be booked two days in advance without including the date of journey and can be done only through e-ticketing.
Tatkal tickets are offered only for selected trains.
Booking starts from 8.00 a.m. onwards on the opening day. For example if you are about to travel on 29th October, booking starts from 8.00 a.m. 27th October onwards.
Availability for Tatkal Quota is to be checked before proceeding.
If you wish to cancel the tickets then 25% of the amount will be deducted excluding the Tatkal Charges and cancellation is possible before 24 hrs from journey.
Cancellation within 24 hrs of scheduled departure is possible but only for unconfirmed tickets. Cancellation charges are based upon the IRCTC norms.
In order to book tickets, you need to have an account with IRCTC. You can easily create an account by clicking on the Signup button in the Login box. Once you login using your credentials, click on the Plan my Travel and Book tickets and enter the From/To details along with class and check the e-ticket and Tatkal quota boxes. Before booking the tickets, you can check the availability, fare and the route.
Here is a snapshot of the registration page.