Sales tax nexus refers to the connection between your business and a state, establishing whether you're required to collect sales tax on your products or services in that state. This means that even if your business doesn't have a physical presence in a state, you may still be required to collect sales tax if you have nexus in that state.

The rules around sales tax nexus are complex and vary from state to state, making it essential to keep up-to-date with the latest regulations and seek appropriate guidance. Ignoring sales tax nexus could result in costly penalties and put your business at risk. As such, it's critical to stay informed and ensure compliance with the sales tax laws of any state where you have nexus.