Wis. Stat. § 168.125

Persons who are liable for the fee under this subchapter shall state the number of gallons of petroleum products on which the fee is due and the amount of their liability for the fee in the reports under s. 78.12 (1) to (3). The requirements for payment of the motor vehicle fuel tax under s. 78.12 (5) apply to the fee under this subchapter.