(1) Taxes due under this part become delinquent if not paid within 60 days after the end of each calendar quarter. The department shall add to the amount of all delinquent retail telecommunications excise taxes penalty and interest, as provided in 15-1-216.
(2) Penalty and interest, as provided in 15-1-216, may be waived by the department if reasonable cause for the failure to file the return, as required by 15-53-139, or to pay the tax due is provided to the department.