450A.11  Duty to claim maximum credit.
  It shall be the duty of any person liable for the payment of the tax to claim the maximum federal credit allowable for that portion of the state generation skipping transfer tax paid in respect of any property included in a taxable generation skipping transfer. Claiming on a federal return a sum less than the maximum federal credit allowable shall not relieve any person liable for the tax of the duty to pay the tax imposed under this chapter.
  If an amended or supplemental return is filed with the internal revenue service which results in a change in the amount of tax owing under this chapter, the persons liable for the payment of the tax shall submit an amended return, on forms prescribed by the director, indicating the amount of the tax then owing as a result of such change.
  If any federal generation skipping transfer tax has been paid before the enactment of this chapter, the persons liable for the payment of the tax under this chapter shall file an amended federal return claiming the maximum federal credit allowable and file the Iowa returns specified in section 450A.8 within six months after the enactment of this chapter or within the time limit provided in section 450A.4 whichever is the later.
[C79, 81, §450A.11]
87 Acts, 1st Ex, ch 1, §24