The proposed amendments to Rule 12C-1.003, F.A.C. (Definitions), define the term “written notice” to include any original or amended corporate income tax or franchise tax return, or any original or amended emergency excise tax return due prior to January 1, 2012. The proposed amendments to Rule 12C-1.051, F.A.C. (Forms), adopt, by reference, changes to tax returns used by the Department in the administration of the corporate income tax and remove obsolete Form DR-703 (Dealer Questionnaire), which is no longer used by the Department. The proposed amendments to Rule 12C-1.343, F.A.C. (Interest Computations): (1) update the provisions regarding interest, as provided in Section 220.807, F.S., on any underpayment or erroneous refund of the corporate income tax or franchise tax, or the emergency excise tax imposed prior to January 1, 2012, and the payment of interest on any overpayment of such taxes; (2) remove obsolete or unnecessary provisions; and (3) provide how to obtain the interest rates.