Iowa Code Title XI. Natural Resources [Chs. 455-485] § 476B.8. Use of tax credit certificates

To claim a wind energy production tax credit under this chapter, a taxpayer must include one or more tax credit certificates with the taxpayer's tax return, or if used against taxes imposed under chapter 423, the taxpayer shall comply with section 423.4, subsection 4, or if used against taxes imposed under chapter 437A, the taxpayer shall comply with section 437A.17B. A tax credit certificate shall not be used or included with a return filed for a taxable year beginning prior to July 1, 2006. The tax credit certificate or certificates included with the taxpayer's tax return shall be issued in the taxpayer's name, expire on or after the last day of the taxable year for which the taxpayer is claiming the tax credit, and show a tax credit amount equal to or greater than the tax credit claimed on the taxpayer's tax return. Any tax credit in excess of the taxpayer's tax liability for the taxable year may be credited to the taxpayer's tax liability for the following seven taxable years or until depleted, whichever is the earlier. If the tax credit is applied against the taxes imposed under chapter 423 or 437A, any credit in excess of the taxpayer's tax liability is carried over and can be filed with the refund claim for the following seven tax years or until depleted, whichever is earlier. However, the certificate shall not be used to reduce tax liability for a tax period ending after the expiration date of the certificate.