Section 35(4) in The Karnataka Value Added Tax Act, 2003
(4)If any dealer having furnished a return under this Act, other than a return furnished under sub-section (3) of Section 38, discovers any omission or incorrect statement therein, other than as a result of an inspection or receipt of any other information or evidence by the prescribed authority, he shall furnish a revised return within six months from the end of the relevant tax period except when such revised return is on issue of a debit note under Section 30, subject to sub-section (2) of Section 72.