Ind. Code § 6-8.1-10-3
(b) If the department prepares a person's return under this section, the person is subject to a penalty of twenty percent (20%) of the unpaid tax. In the absence of fraud, the penalty imposed under this section is in place of and not in addition to the penalties imposed under any other section.
As added by Acts 1980, P.L.61, SEC.1.