Indiana Code Title 4. State Offices and Administration § 4-10-22-4

(1) To qualify for a refund, a taxpayer must have filed, by the end of the calendar year in which a determination is made under section 1 of this chapter that the state has excess reserves, an Indiana resident individual adjusted gross income tax return for the taxpayer's taxable year ending in the calendar year immediately preceding the calendar year in which such a determination is made.

(2) The amount of the refund is determined for each qualifying taxpayer as follows:

STEP ONE:  Determine the total amount of excess state reserves that under section 3 of this chapter are available to provide automatic taxpayer refunds.

STEP TWO:  Determine the total number of taxpayers that qualify for a refund under subdivision (1).

STEP THREE:  Determine the result of:

as rounded to the nearest dollar.

(3) The refund is a refundable credit that shall first be applied as a credit against adjusted gross income tax liability in the taxpayer's taxable year in which a refund is provided.  Any remaining unused credit shall be refunded to the taxpayer.  The credit may not be carried forward.

(4) If an individual and the individual's spouse file a joint Indiana resident individual adjusted gross income tax return for the taxable year ending in the calendar year immediately preceding the year in which a determination is made under section 1 of this chapter that the state has excess reserves:

(5) The refund under this chapter is subject to IC 6-8.1-9-2, IC 6-8.1-9.5, and IC 6-8.1-9.7.