South Dakota is taking on Wayfair and the high court's decision will impact just about anyone who shops online.
Currently, large businesses like Target and Walmart that have brick and mortar locations in a state collect sales tax from online customers.
But online sellers, such as 1-800-Contacts and Wayfair, can often sidestep charging the tax.
That practice stems from a 1992 Supreme Court decision. If it's reversed, it could mean all online retailers have to collect taxes everywhere.
South Dakota Attorney General Marty Jackley has been preparing for this case for months.
"As we wait, it hurts small businesses across our nation. It's hurting our retail industry and it's really killing Main Street America. It's a situation where it's time to act. The South Dakota Legislature working with the South Dakota retailers have a good solution and it's something that it's time for America to Move Forward on," Jackley said.
A reporter with KELOLAND's Washington Bureau will be in the courtroom for Tuesday's hearing.
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Retail & Restaurants
On Tuesday, the nation will be watching as South Dakota brings its case to the U.S. Supreme Court.