Businesses across the United States are attempting to recover billions of dollars in tariffs after the Supreme Court ruled they were illegal. The tariffs were imposed under the International Economic Emergency Powers Act and were struck down two months ago. Federal agencies have launched an online portal allowing importers to apply for refunds, with tens of thousands of businesses already signed up. The process could be particularly challenging for small businesses, many of which have struggled under the weight of the tariffs. The launch of the refunding system led to technical issues and a crash of the website.