Time barred

SIR, PLEASE GIVE ADVISE. I HAVE FILED MY RETURN OF INCOME FOR A.Y.2013-2014 (F.Y.2012-2013) ON DATED 01-01-2014 AND THEREAFTER A NOTICE WAS SERVED TO ME FROM INCOME TAX DEPARTMENT U/S 143(2) FOR ASSESSMENT OF INCOME (SCRUTINY PROCEEDINGS) ON DATED 05-03-2015. AS PER SECTION 143(2) THE NOTICE IS VALID OR INVALID. AS THE PERIOD OF SIX MONTH HAS BEEN EXPIRED FOR SCRUTINY OF INCOME. HENCE, WHAT SHOULD I GIVE HIM REPLY UNDER SUCH CIRCUMSTANCES. PLEASE HELP