Sales Tax for online orders

@lostsouth has it right.

Per google"

Yes, most states now require sales tax on internet sales from out-of-state sellers who don’t have physical nexus, thanks to the Supreme Court’s 2018 Wayfair decision, which established economic nexus based on sales volume or transaction count, not just physical presence. Even if a seller doesn’t collect it, buyers in many states are legally required to pay use tax directly to their state, though enforcement varies. 

States have been attempting to create "nexus" with on-line sales for decades. Many on-line platforms such as Audiogon, have been required to comply. I have a business that sells non-electronics on EBAY. As a seller, I pay them additional fees to collect and manage state sales taxes for all of my sales; it is based on the ship-to location of the buyer. As a former CPA I would not wish to deal with it myself. Audiogon obviously does not charge that management fee to the sellers, but directly to the buyer. That is doing e-business in today's economy.

This came from a federal decision out of the Dakota and auto pen.some charge some dont.cant figure it out but know I don't benefit from it.

Its nice we pay the state to collect thier bills.wish i could run my business like that

I have REAL heartburn about Sales/Use Tax arising from, applied to and collected from 'person-to-person' sell/buy transactions of 'Used' or 'Pre-Owned' items.  This, regardless of how the PRIVATE non-merchant parties to the sale came together.  Remember newspaper Classified Ads or the periodical Penny Saver publication?  Since when did THEY ever collect Sales Tax on the "commerce" they facilitated between PRIVATE persons for their Used junk - with only the information 'service' they offered?!  It's too late now, but maybe in the future...VOTE SMARTER?!  Or better yet first GET smart.  It is the ONLY way this American way of life will sustain itself.