12 December 2013
for A.Y.2013-14 due date to file return is . . http://blog.tdsman.com/2013/05/income-tax-return-due-date-a-y-2013-14/ . . in general . as per sec.139
1)for those who are subject to tax audit have to file return with in 30 th september
2)for those who are not subject to tax audit have to file returns with in 30th july