https://www.cnbc.com/2018/06/21/supreme-court-rules-that-states-can-force-online-shoppers-to-pay-sales-tax.html

States have broad authority to force online retailers to collect potentially billions of dollars worth of sales taxes, the U.S. Supreme Court ruled on Thursday, siding with South Dakota in its high-profile fight with e-commerce companies.

The justices, in a 5-4 ruling against Wayfair, Overstock.com and Newegg, overturned a 1992 Supreme Court precedent that had barred states from requiring businesses with no "physical presence" in that state, like out-of-state online retailers, to collect sales taxes.