28 Correction of deficiencies

28 Correction of deficiencies    [If a person discovers a discrepancy in a return furnished by him for a tax period under this Act, he shall remove such discrepancy and furnish a revised return within the year following the year of such tax period:      PROVIDED that if, as a result of the discrepancy, the person has paid less tax than was due under this Act, he shall, pay the tax owed and interest thereon:    PROVIDED FURTHER that for the years 2008-09, 2009-10 and 2010-11, except for those returns pertaining to any tax period of 2010-11, which were scheduled to be furnished in the year 2011-12, the revised return shall be required to be furnished by 31st December, 2012.]