IRCTC.co.in is the worst site that you can trust when most needed. Ill compare the Site with Indian Trains( fully Occupied, late, you cannot trust them). In reference to Tatkal Seva: the reservation window and the site is full of PIMPS.
If you are non-violent then you have no chance to get a Tatkal reservation easily. Everybody there is ready to fight. Dont even think about booking a Tatkal ticket Online( it is Sin).
Some of the Employees booking the Tatkal Tickets are the same.they too are like Indian trains Relaxed and easy.
If you want to experience INDIAN RAILWAYS start it with https://irctc.co.in at sharp 10am.