Please check if your Income Tax Return has been filed. The last date for Income Tax return u/s 139(4) for Financial Year 2015-2016 & 2016-2017 is March 31st 2018.

As per Finance Bill 2016,there is amendment of section 139.Amended Section 139(4):

Any person who has not furnished a return within the time allowed to him under sub-section (1), may furnish the return for any previous year at any time before the end of the relevant assessment year or before the completion of the assessment, whichever is earlier.

This means that Income Tax return for FY 2016-17 can be filed before the end of relevant assessment year,2017-18. so latest by 31st March 2018.

Before amendment to section 139(4) the provision said:

A person who has not furnished a return within the time allowed to him under subsection (1), or within the time allowed under a notice issued under sub -section (1) of section 142 of the Income-tax Act, may furnish the return for any previous year at any time before the expiry of one year from the end of the relevant assessment year or before the completion of the assessment, whichever is earlier.

This means Income Tax return for FY 2015-16 can be filed before end of one year form the relevant assessment year(2016-17) that is before end of 2017-18 so its March 2018.

If this deadline is missed then the person will have to face the consequences for non filing of the IT return.