423.31  Filing of sales tax returns and payment of sales tax.
  1.  Each person subject to this section and section 423.36 and in accordance with the provisions of this section and section 423.36 shall, on or before the last day of the month following the close of each calendar quarter during which such person is or has become or ceased being subject to the provisions of this section and section 423.36, make, sign, and file a return for the calendar quarter in the form as may be required. Returns shall show information relating to sales prices including goods, wares, and services converted to the use of such person, the amounts of sales prices excluded and exempt from the tax, the amounts of sales prices subject to tax, a calculation of tax due, and any other information for the period covered by the return as may be required. Returns shall be signed by the retailer or the retailer’s authorized agent and must be certified by the retailer to be correct in accordance with forms and rules prescribed by the director.
  2.  Persons required to file, or committed to file by reason of voluntary action or by order of the department, deposits of taxes due under this subchapter shall be entitled to take credit against the total quarterly amount of tax due such amount as shall have been deposited by such persons during that calendar quarter. The balance remaining due after such credit for deposits shall be entered on the return. However, such person may be granted an extension of time not exceeding thirty days for filing the quarterly return, upon a proper showing of necessity. If an extension is granted, such person shall have paid by the twentieth day of the month following the close of such quarter ninety percent of the estimated tax due.
  3.  The sales tax forms prescribed by the director shall be referred to as “retailers tax deposit”. Deposit forms shall be signed by the retailer or the retailer’s duly authorized agent, and shall be duly certified by the retailer or agent to be correct. The director may authorize incorporated banks and trust companies or other depositories authorized by law which are depositories or financial agents of the United States, or of this state, to receive any sales tax imposed under this chapter, in the manner, at the times, and under the conditions the director prescribes. The director shall prescribe the manner, times, and conditions under which the receipt of the tax by those depositories is to be treated as payment of the tax to the department.
  4.  Every retailer at the time of making any return required by this section shall compute and pay to the department the tax due for the preceding period. The tax on sales prices from the sale or rental of tangible personal property under a consumer rental purchase agreement as defined in section 537.3604, subsection 8, is payable in the tax period of receipt.
  5.  a.  Upon making application and receiving approval from the director, a parent corporation and its affiliated corporations that make retail sales of tangible personal property or taxable enumerated services may make deposits and file a consolidated sales tax return for the affiliated group, pursuant to rules adopted by the director. A parent corporation and each affiliate corporation that files a consolidated return are jointly and severally liable for all tax, penalty, and interest found due for the tax period for which a consolidated return is filed or required to be filed.
  b.  A business required to file a consolidated sales tax return shall file a form entitled “schedule of consolidated business locations” with its quarterly sales tax return that shows the taxpayer’s consolidated permit number, the permit number for each Iowa business location, the state sales tax amount by business location, and the amount of state sales tax due on goods consumed that are not assigned to a specific business location. Consolidated quarterly sales tax returns that are not accompanied by the schedule of consolidated business locations form are considered incomplete and are subject to penalty under section 421.27.
  6.  If necessary or advisable in order to insure the payment of the tax, the director may require returns and payment of the tax to be made for other than quarterly periods, the provisions of this section or other provision to the contrary notwithstanding.
  7.  Notwithstanding any other provision of the Code to the contrary, the department shall not attempt to collect delinquent sales tax on a transaction involving the furnishing of lawn care, landscaping, or tree trimming and removal services which occurred more than five years from the date of an audit.
2003 Acts, 1st Ex, ch 2, §124, 205; 2008 Acts, ch 1172, §23