Section 67-4-2003 - Administration by department of revenue - Forms and reports(a) The supervision and collection of the tax imposed by this part is under the direction of the department of revenue, and such department has the authority and power to prescribe forms upon which entities liable for the tax imposed shall make reports of such facts and information as will enable the commissioner to ascertain the correctness of the amount reported and paid by such entities.(b) The commissioner may, within the commissioner's discretion, require any taxpayer to file with its Tennessee excise tax return, a copy of the federal tax forms filed with the internal revenue service for the same tax year.(c) All persons subject to the tax imposed by this part shall register with the department of revenue by completing and filing a registration information form prescribed by the department. Such form shall be filed with the department within sixty (60) days after July 1, 1999, or within fifteen (15) days after the date the person becomes subject to the tax, whichever date occurs last; provided, that persons registered under prior law, or who have filed a return under prior law, are not required to register for the tax imposed by this part.