Section 26-51-807 - Filing returns - Extensions of time(a)(1) Any person who requests an automatic extension of time for filing a federal income tax return and who attaches a copy of the request to the corresponding state income tax return shall be granted an extension of time until one (1) month after the due date of the federal income tax return to file the corresponding state income tax return.(2) Any person who receives an extension of time for filing a federal income tax return in addition to an automatic extension, and who attaches a copy of the document granting the federal extension to the corresponding state income tax return, shall be granted an extension of time until one (1) month after the due date of the federal income tax return to file the corresponding state income tax return.(b)(1) The Secretary of the Department of Finance and Administration shall assess the taxpayer interest at the rate of ten percent (10%) per annum on the amount of tax finally determined to be due.(2)(A)(i) The interest on income tax other than corporation income tax may be computed from April 16 if the return covers the preceding calendar year.(ii) If the return covers a fiscal year, interest shall be computed from the day following the expiration of three and one-half (31/2) months after the closing date of the period covered.(B) The interest on corporation income tax shall be computed as follows: (i) If the return covers a calendar year, from March 16; or(ii) If the return covers a fiscal year, from the day following the expiration of two and one-half (21/2) months after the closing date of the period covered.(c) The secretary may grant a taxpayer's written request to extend the time for filing a corporation income tax return for a period of time not to exceed sixty (60) days in addition to the extensions provided in subsection (a) of this section that correspond to the extensions for filing a federal return.(d) The secretary may promulgate rules granting automatic extensions of time to file income tax returns and information returns without the taxpayer being required to submit a written application, a copy of the federal request for extension, or a copy of the document granting the federal extension if the secretary determines that such requirements are unnecessary for the administration of the income tax laws.Amended by Act 2021, No. 629,§ 2, eff. for tax years beginning on or after January 1, 2021.Amended by Act 2019, No. 315,§ 2970, eff. 7/24/2019.Amended by Act 2019, No. 910,§ 3739, eff. 7/1/2019.Amended by Act 2019, No. 910,§ 3738, eff. 7/1/2019.Acts 1929, No. 118, Art. 4, § 22; 1935, No. 23, § 1; 1937, No. 183, § 1; Pope's Dig., § 14045; Acts 1979, No. 600, § 1; 1981, No. 403, § 1; 1983, No. 832, § 1; A.S.A. 1947, § 84-2027; Acts 1991, No. 685, § 9; 2003, No. 774, § 3; 2007, No. 369, § 2.