The following are provisions for refunding or crediting to the taxpayer deposits or payments for tax in excess of amounts legally due.
If an overpayment of income tax is claimed as a credit against estimated tax for the succeeding taxable year, such amount shall be considered as a payment of the income tax for the succeeding taxable year and no claim for credit or refund shall be allowed.
When a taxpayer elects to have an overpayment credited to estimated tax for the succeeding year, interest may be properly assessed on a deficiency of income tax for the year in which the overpayment arose. If a taxpayer elects to have all or part of an overpayment shown on the return applied to the estimated income tax for the succeeding taxable year or refunded, the election is binding to the taxpayer.
An overpayment of tax may be used to offset any outstanding tax liability owed by the taxpayer, but once an elected amount is credited as a payment of estimated tax for the succeeding year, it loses its character as an overpayment for the year in which it arose and thereafter cannot offset any subsequently determined tax liability.
EXAMPLE 1. Corporation A had paid at least 90 percent of the tax shown due on its Iowa corporation income tax return for the year ending December 31, 1999, by the April 30 original due date and filed its original 1999 Iowa return on May 15, 2000. Corporation A determined that it was entitled to claim additional deductions on the original 1999 Iowa return, so Corporation A filed an amended 1999 return on October 31, 2003. The amended return was filed within the three-year statute of limitations for refund since it was filed within three years of the extended due date of the return, October 31, 2000. The six-month extended due date applied in this case because the original return was filed within the six-month extended period.
EXAMPLE 2. Corporation B paid 90 percent of the tax shown due on its return for the period ending June 30, 2000, by the October 31 original due date and filed the original return on or before the October 31, 2000, original due date for this return. Corporation B determined that when it filed the original Iowa return for the period ending June 30, 2000, Corporation B failed to claim an Iowa credit for increasing research activities. Corporation B filed an amended Iowa return on November 15, 2003, to claim the Iowa credit for increasing research activities. This amended return was rejected by the department because it was not filed within three years of the due date of the return. Although Corporation B had paid 90 percent of the tax by the due date, the due date was not extended because the original return had been filed by the due date of October 31, 2000.
This rule is intended to implement Iowa Code section 422.73 as amended by 2012 Iowa Acts, Senate File 2328.
Iowa Admin. Code r. 701-504.3