Section 205.240 - Calculation of penalties and interest; accrual of interest on refunds(1) Penalties and interest provided for under sections 23 and 24 of 1941 PA 122, MCL 205.23 and 205.24, shall be calculated on the balance of the tax due.(2) Interest on refunds shall accrue in accordance with section 30 of 1941 PA 122, MCL 205.30.Add. 1993, Act 54, Imd. Eff. 6/3/1993 ;--Am. 1998, Act 277, Imd. Eff. 7/27/1998.