Nonetheless, the Massachusetts Legislature did what many other state legislatures did after Wayfair: It enacted an economic nexus law similar to the South Dakota law that led to the repeal of the physical presence rule.
Under economic nexus, a remote retailer establishes a sales tax collection obligation solely through economic activity in a state. South Dakota and most other states with economic nexus allow safe harbor for small sellers, so remote retailers are only required to collect and remit sales or use tax in states where their sales in the state exceed the small seller exception.
Massachusetts enacted economic nexus in July 2019. House Bill 4000 requires an out-of-state business with no other collection obligation in the commonwealth to collect and remit Massachusetts sales tax if its taxable sales in Massachusetts exceed $100,000 in the current or previous calendar year. The measure also requires marketplaces to collect and remit tax on all sales in Massachusetts, including third-party (marketplace) sales.
The $100,000 economic nexus threshold is considerably lower than the threshold established by the cookie nexus rule, which allowed an exception for small remote online sellers with $500,000 or less in internet sales in Massachusetts and no more than 100 transactions in the commonwealth during the preceding 12 months.
In other words, having both an economic nexus law and a cookie nexus rule is a bit confusing.