Beginning January 1, Amazon will be collecting a sales tax for all package deliveries in Iowa.
Iowa is the 31st state in the US to collect a sales tax for orders made on the website. The Iowa Dept. of Revenue estimates the tax will bring in $18-24 million per year, and they say small businesses in the state could benefit from the tax because it eliminates the idea of a tax "discount" when you use Amazon.
Illinois passed a similar law last year.