Shirish ji,
Please refer to my reply to you on 24th Aug. at 06:39 PM under the train head "Goa Express 2780", which was as follows:
"...When ever you need to know the quota, see 'Seat Availability' for the 91st day before before 8:00 AM. This applies for the stations from where the train departs during the same Calendar day on which it orginates. If the train departs on the 2nd day, look for 92nd day and so on...."
This...
more... way, Tatkal quota can also be known as appears on the fourth day (or 5th, 6th... day if the train is not departing from a station on the originating day and a Tatkal quota is available from that Station).
Thus, you can see any quota from anywhere to anywhere, enroute a particular train. Hope this serves the purpose. If not clear, come back, please.
- S K Jain