Ind. Code § 6-1.1-37-7.5

Sec. 7.5. A person who fails to provide, within forty-five (45) days after the filing deadline, evidence of the filing of a personal property return to the township assessor or the county assessor, as required under IC 6-1.1-3-1(d), shall pay to the county a penalty equal to ten percent (10%) of the tax liability.