Section 205.238 - Amended return; filing; claim for refund; final determination of federal transfer tax; refund prohibited under certain conditions(1) If the federal authorities increase or decrease the amount of the federal transfer tax, an amended return shall be filed with the department showing all changes made in the original return and the amount of increase or decrease in the federal transfer tax within 60 days after a final determination if there is an increase in the amount owed the state, or within 1 year after a final determination if there is a refund owed by the state.(2) A claim for a refund of the tax shall be made within 1 year from the date of the final determination of the federal transfer tax. For purposes of this subsection, a determination is considered to have become final on the date of the internal revenue service closing letter or the date of receipt of a refund of a federal transfer tax, whichever is later.(3) Notwithstanding any other provision of this section, a tax may not be refunded pursuant to any allegation that the decedent was a resident of another state unless this state is a party to a compromise agreement between the decedent's transferee and the other state or unless this state is allowed to intervene as a party in any action in the other state in which the residency of the decedent is at issue.Add. 1993, Act 54, Imd. Eff. 6/3/1993 .