On June 21, 2018, the Supreme Court ruled 5-4 in South Dakota v. Wayfair et al. that the Constitution does not prevent the State of South Dakota from requiring large online retailers without actual physical presence in the state to collect and remit sales tax. The Supreme Court’s decision is based on a South Dakota statute that it viewed as not imposing significant burdens on interstate commerce, because, among other things, it was prospective in its application, imposed a single level of tax and applied only to non-resident sellers that deliver more than $100,000 in goods or services or engage in 200 or separate transactions for the delivery of goods and services into South Dakota. The Court otherwise left open the question of whether other statutory conditions would render a similar result.

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