What is Nexus?
Nexus is the level of connection between an entity (such as a seller) and a taxing jurisdiction (such as a state)
As an online business, it is your responsibility to charge your buyers the correct amount of sale tax and remit the taxes you collected back to the state.
Many online sellers have confusion when it comes to charging sales tax in certain states that they might not even think they have nexus in.
Nexus laws vary by each state, and thus, if you have an ecommerce company and sell on multiple channels, or have an FBA, you must know the laws in each state that you have either physical or economic nexus.