Tax Jar is another. I dont have a problem paying the fees but as stated above, the filing in all jurisdictions is such a pain it will knock out alot of small sellers online. The seller will have to pay a bond in nearly every state and some cities which can add upto thousands of $$. No clue how the Chinese sellers will handle it, they probably just wont remit.

I think eBay and Etsy side hustle sellers especially should be worried. This helps large internet retailers like Amazon. They have the systems in place to charge and remit sales tax for 3rd party merchants, they've just been waiting until this ruling happened.