Iowa Administrative Code Title 701 — Department of Revenue
Iowa Admin. Code r. 701—213.15(423) — Goods damaged in transit
213.15(1) If goods shipped by a retailer have been delivered under a contract for sale to a consumer, and thereafter the goods are damaged in the course of transit to the consumer, the retailer and purchaser shall be liable for tax upon the full sale price of the goods, as the sale to the consumer has been completed. 213.15(2) If the goods have not been delivered to the consumer, the sale to the consumer has not been completed, and the retailer shall not be taxed for the amount agreed to be paid by the consumer.
Source: official text