I want to book tatkal tickets of Sleeper Class in May last week by paschim express from Chandigarh to Mumbai but combined quota of tatkal of Chandigarh and Kalka is only 43 .
So I want to access New Delhi Quota which is 172 berths and travel by second seating class from chandigarh to New Delhi. Can I do so, if yes, how to fill the booking form.