S.D. Codified Laws § 10-47B-191
This section applies to any fuel that is not specifically taxed by this chapter that is used to propel a motor vehicle on the highways of this state. For the purposes of this section, fuel means any solid, liquid, or gas, or any combination thereof, that is consumed by the motor vehicle to propel the motor vehicle on the highways of this state that is not otherwise taxed by this chapter.
A fuel excise tax is imposed on all fuel as defined by this section. The fuel excise tax is imposed at the equivalent rate of $.22 per 116,090 BTU of energy of the fuel, which is the equivalent energy of a gallon of gasoline. The owner or operator of the motor vehicle shall remit the tax imposed by this section.
The owner or operator of the motor vehicle shall report to the department the type of fuel used to propel the motor vehicle, the amount of fuel used to propel the motor vehicle, the miles driven by the motor vehicle, and any other information that the secretary may require. The report shall be on a form provided by the department and shall be filed on a monthly basis by electronic means on an electronic reporting system furnished by the department. The report required by this section shall be filed with respect to information for the preceding monthly period by electronic means on or before the twentieth day of the month following each monthly period.
All tax required to be remitted by this section is due and payable by electronic transfer on or before the twenty-fifth day of the month following each period. If the due date falls on a Saturday, Sunday, legal holiday enumerated in § 1-5-1, or a day the Federal Reserve Bank is closed, the remittance is due on the next succeeding day that is not a Saturday, Sunday, legal holiday enumerated in § 1-5-1, or a day on which the Federal Reserve Bank is closed.
SDCL 10-47B-191