Re: Setting Up Zones/Taxes
Kind of a minefield right now, but most Zenners only charge sales tax to the customers in their state, unless they also have some sort of 'presence' in other states.
There's a lot of litigation going on about this right now, and I read recently that Amazon no longer allows affiliates from North Carolina because of the laws there which define affiliate activity as a presence (called a 'nexus') in that state, making all purchases from Amazon taxable to NC residents. New York also has such a law and I think California is considering one.
Most of us are probably small enough to fly under the radar, but the taxing folks will get to us eventually, so write your state legislators.
All that said, it's probably best to ask your/an accountant.