If you're a U.S. based business that is selling digital products to U.S. customers then chances are you may need to begin collecting sales tax on those sales. Due to the South Dakota vs. Wayfair decision the precedent has been set for states to begin enforcing sales tax collection and remittance on the purchase of digital goods, even if you, the business are registered outside of that state.
For example, your business may be based in Kansas but if you have an employee in South Dakota and are selling to customers in South Dakota then you need to be remitting sales tax for those transactions. Or if you have 200 customers in South Dakota then you also are required to collect sales taxes. Gulp!
Thankfully this process is becoming easier and easier through the combination of Mavenseed and TaxJar.