[mjn]

> the punchline for the overwhelming majority of HNers is that if you do not have an employee who performs work for you within Massachusetts you almost certainly do not have a nexus there

If you're a consultant who does work on-site for an MA client, that may also establish a nexus. In some cases it can do so even if you don't physically travel to MA, since the services can be deemed to have been rendered in the client's location. But others are deemed to have been rendered in the consultant's remote location. It's a little conceptually (and legally) unclear where remote services "happen", and seems to depend on the state and the service and the precise consulting relationship.

[will_work4tears]

Conventions that are work related and you work at a both promoting your work or products counts as well it seems. I had a client that went to Vegas several times a year for a convention and just running a booth made Vegas a nexus for him.