Iowa Admin. Code r. 701-52.6
A corporation may elect to receive an income tax credit in lieu of the motor fuel tax refund provided by Iowa Code chapter 452A. A corporation which holds a motor fuel tax refund permit when it makes this election must cancel the permit within 30 days after the first day of the tax year However, if the refund permit is not canceled within this period, the permit becomes invalid at the time the election to receive an income tax credit is made. The election will continue for subsequent tax years unless a new motor fuel tax refund permit is obtained.
The amount of the income tax credit must be the amount of Iowa motor fuel tax paid on qualifying fuel purchases as determined by Iowa Code chapter 452A and Iowa Code section 422110. less any state sales tax as determined by 701-subrule 231.2(2). The credit must be claimed on the tax return covering the tax year in which the motor fuel tax was paid. If the motor fuel credit results in an overpayment of income tax, the overpayment may be refunded or may be credited to income tax due in the subsequent tax year.
Shareholders of S corporations may claim an income tax credit on their individual income tax returns for their respective shares of the motor vehicle fuel taxes paid by the corporations. The credit for a shareholder is that person's pro-rata share of the fuel tax paid by the corporation. A schedule must be attached to the individual's return showing the distribution of gallons and the amount of credit claimed by each shareholder
The corporation must attach to its return a schedule showing the allocation to each shareholder of the motor fuel purchased by the corporation.
This rule is intended to implement Iowa Code section 42233..
Iowa Admin. Code r. 701-52.6