Section 55C(1) in The Kerala General Sales Tax Act, 1963
(1)Where any tax or any other amount due or demanded under the Act is paid by any dealer or other person, the payments so made shall be appropriated first towards interest accrued on such tax or other amount under sub-section (3) of section 23 on such date of payment and the balance available shall be appropriated towards principal outstanding, notwithstanding any request to the contrary by the dealer or any person making such payments.