Section 55(4) in The Karnataka Value Added Tax Act, 2003
(4)In determining whether or not the price shown in the invoice, challan, delivery note, or any other related document involves under-valuation, in the case of owner of the goods other than an owner carrying on business in packaged goods, the authority exercising the power under sub-section (1) shall apply the prevailing market price or fair market value and in the case of an owner carrying on business in packaged goods, shall apply the Maximum Retail Price.