Over half the states now have laws and regs making out-of-state businesses to charge and submit sales taxes on sales within their state.
The laws differ, but most need firms to submit sales taxes if they made at least $100,000 of sales in the state the prior year.
In the interim, don’t think about a similar federal law—it stalled in Congress in 2018 and has little support in 2019.
Don’t be soothed by the scarcity of promotion on sales tax conditions since the 2018 Supreme Court decision allowing states to tax cross-border sales transactions. [South Dakota v. Wayfair Inc.]
To determine your firm’s out-of-state sales, check each state’s law—and to streamline filing and remittance for many states, join the Streamlined Sales and Use Tax Agreement on the same site.