701—150.2 (421,26USC6402) Definitions. The following definitions are applicable to the federal offset program:
“Assessment” means the determination of a past due tax obligation and includes self-assessments. An assessment includes the Iowa income tax, interest, penalties, fees or other charges associated with the past due legally enforceable Iowa income tax obligation.
“Department,” “state of Iowa,” “Iowa”  or “the state”  means the Iowa department of revenue.
“Director” means the director of the Iowa department of revenue.
“Overpayment” means a federal tax refund due and owing to a person or persons.
“Past due legally enforceable Iowa income tax obligation” means a debt which resulted from a judgment rendered by a court of competent jurisdiction which has determined an amount of state income tax to be due or a determination after an administrative hearing which has determined an amount of state income tax to be due and which is no longer subject to judicial review. In addition, this term also includes a debt which resulted from a state income tax which has been assessed but not collected, for which the time for redetermination has expired, and which has not been delinquent for more than ten years.
“Resident of Iowa” means any person with a federal overpayment for the year in which Iowa seeks offset and such person has an Iowa address listed on that person’s federal return for the tax period of overpayment.
“Secretary” means the Secretary of the Treasury for the federal government.
“State income tax obligation”  or “Iowa income tax obligation”  is intended to cover all Iowa income taxes. This term includes all local income taxes administered by the Iowa department of revenue or determined to be a “state income tax” under Iowa law. Such taxes may include, but are not limited to, individual income tax, income surtax, fiduciary income tax, withholding tax, or corporate income tax, and penalties, interest, fines, judgments, or court costs relating to such tax obligations.
“Tax refund offset” means withholding or reducing, in whole or in part, a federal tax refund payment by an amount necessary to satisfy a past due legally enforceable state income tax obligation owed by the payee (taxpayer) of the tax refund payment. This rule only involves the offset of tax refund payments under 26 U.S.C. 6402(e); it does not cover the offset of federal payments other than tax refund payments for the collection of past due legally enforceable state income tax obligations.
“Tax refund payment” means the amount to be refunded to a taxpayer by the federal government after the Internal Revenue Service (IRS) has applied the taxpayer’s overpayment to the taxpayer’s past due tax liabilities in accordance with 26 U.S.C. 6402(a) and 26 CFR 301.6402-3(a)(6)(i).