I'm not sure I really did ever figure this out. As far as I can tell, there's no way on the website to tell whether AirBnB is collecting just state taxes or also county taxes. A while back I did a calculation that seemed to indicate it was only collecting state taxes, so I just kept paying the Beaufort county tax on these bookings. However, I just did the calculation again and it seems like AirBnB is collecting more than they used to for tax (I can't figure it out exactly but it's between 8% and just over 10%), which kind of implies that it's collecting the county tax as well. If this is the case, it's only remitting the taxes annually, when I'm set up to pay the state and county monthly, so I'm not sure what the hell I'm supposed to do. Guess I'll be trying to go through the hassle of talking to someone there directly, though last time I did after I posted my original question they were not helpful. If you have any further info on this please update.