Indiana Code Title 6. Taxation § 6-3-4-16.3

Sec. 16.3. (a) For taxable years ending after December 31, 2021, a corporation other than a corporation described in IC 6-3-2-2.8(2) subject to tax under this article and that has more than one million dollars ($1,000,000) in gross income (as defined in Section 61 of the Internal Revenue Code) for the taxable year shall file a return required under section 1(3) of this chapter for that taxable year in an electronic manner specified by the department.

(b) If the department does not specify an electronic format for filing the required return for a corporation for purposes of section 1(3) of this chapter, the corporation is not required to file in an electronic manner.

(c) Notwithstanding any other provision of this section, the department may provide exceptions to the requirement to file a return in an electronic manner specified by the department.  Such exceptions shall be published in the Indiana Register.

(d) For purposes of this requirement, a return for a corporation shall include any amended return for the corporation.