i want to travel from Faridabad(FDB) to MUMBAI(DDR) on 27 March 2016. when can i apply for tatkal ticket please suggest as i m confused when will the tatkal gets open for Train No. 12904 if i have to travel on 27 March 2016 from faridabad as the train starts from Amritsar(ASR) on 26 March 2016 in Night.