The annual sales tax holiday in Iowa is today and tomorrow. There will not be sales tax collected on each article of clothing or footwear that costs under $100. The two-day tax holiday event does not include jewelry, watches or cosmetics. It does, however, include under garments, bathing suits, diapers, hats and scarves. Businesses are required to participate and the holiday does not include Sunday. For a complete list of tax exempt items click here.