Tennessee Code Title 67. Taxes and Licenses § 67-3-1115

(a) For the purpose of determining the amount of tax imposed by § 67-3-1113, each permittee shall file with the commissioner, on a form prescribed by the commissioner, a monthly report on or before the twenty-fifth day of the month following the month of activity, whether or not fuel is used. The report shall be executed under a declaration of penalty of perjury and shall state the total number of gallons of compressed natural gas used by the permittee within the state.

(b) A permittee who consumes compressed natural gas in motor vehicles for highway use shall report each vehicle and the fuel used. Odometer readings of motor vehicles at the beginning and the end of the month shall be furnished, together with other information as required by the commissioner. The permittee shall keep odometers on all the motor vehicles in good working order at all times. The permittee need not provide odometer readings, if excused by the commissioner for good cause shown.