Date of AGM- 30th sept, 2011
Nov date- 30th Nov, 2011 or
60 days of its due date - 30th Nov, 2011 (60 days frm date of AGM)
whichever is later.
Hence, in any case the last date is 30th Nov, 2011.
If there is extension of financial year or AGM date, then accordingly it shall be revised, i guess.