Ind. Code § 6-8.1-10-6
(a) As used in this section, "information return" means the following when a statute or rule requires the following to be filed with the department:
(3) Any form, statement, or schedule required to be filed with the Internal Revenue Service under 26 C.F.R. 301.6721-1(g) (1993).
The term does not include form IT-20FIT, IT-20S, IT-20SC, IT-41, or IT-65.
(c) For purposes of this section, the filing of a substantially blank or unsigned return does not constitute a return.
As added by Acts 1980, P.L.61, SEC.1. Amended by P.L.18-1994, SEC.45.