02 August 2016
Due Date for filing is 31st July, though date has been extended but liability arises after due date. this is a facility given by the IT dept. tax payment date will not change. that's why interest has been calculated
10 August 2016
its facility provide so that you can file a return within due date, so that in near future, you can have the facility to revise the return but not to deposit the tax. income tax dept. has given you 4 months of calculating and depositing the tax amount. this is totally my opinion