Payment of delinquent filing fee or penalty; interest; when return, statement or payment is considered delinquent

1. Any special fuel user who fails to file a tax return or pay any excise tax by the date due shall pay, in addition to any tax that may be due, a delinquent filing fee of $50 or a penalty of 10 percent of the amount of tax owed, whichever is greater, plus interest on the amount of any tax that may be due at a rate established by the Department in accordance with the provisions of a cooperative agreement entered into pursuant to NRS 366.175, from the date the tax was due until the date of payment. 2. A tax return, statement or payment is considered delinquent if it is not received by the Department on or before the date the tax return, statement or payment is due, as prescribed by the provisions of this chapter. 3. A tax return, statement or payment shall be deemed received on the date shown by the cancellation mark stamped by the United States Postal Service or the postal service of any country upon an envelope containing the tax return, statement or payment.