The South Dakota law under review: “The law required out-of-state sellers who do more than $100,000 of business in the state or more than 200 transactions annually with state residents to collect sales tax and turn it over to the state.”
I understand that. I assume many online sales sites will start calculating and collecting sales taxes for small businesses - for a fee.
Don’t know if the ruling will open the door for county and city taxes as well.