Indiana Code Title 6. Taxation § 6-8.1-15-21

Sec. 21. (a) If a customer believes that an amount of tax, charge, or fee or an assignment of place of primary use or taxing jurisdiction included on a bill under this chapter is erroneous, the customer shall notify the home service provider in writing.  The customer shall include in the written notification the street address for the customer's place of primary use, the account name and number for which the customer seeks a correction, a description of the error asserted by the customer, and any other information that the home service provider reasonably requires to process the request.

(b) Within sixty (60) days after receiving a notice under this section, the home service provider shall review its records to determine the customer's taxing jurisdiction.  If the review shows that the amount of tax, charge, or fee or assignment of place of primary use or taxing jurisdiction is in error, the home service provider shall correct the error and refund or credit the amount of tax, charge, or fee erroneously collected from the customer for a period of up to two (2) years.  If the review shows that the amount of tax, charge, or fee or assignment of place of primary use or taxing jurisdiction is correct, the home service provider shall provide a written explanation to the customer.

(c) The procedures set forth in this section are the first course of remedy available to a customer seeking correction of assignment of place of primary use or taxing jurisdiction, or a refund of or other compensation for taxes, charges, or fees erroneously collected by the home service provider.   No cause of action based upon a dispute arising from the collection of any such taxes, charges, or fees shall accrue until a customer has exhausted the remedies set forth in this section.