“Our community members in San Francisco have told us they want to pay their fair share and the overwhelming majority have asked us to help,” David Owen, Airbnb head of public policy, wrote in a blog post. If one-quarter of those Airbnb units were rented every night (in line with the proposed limit), they would generate $30,744 in hotel taxes a night, or $11.22 million a year (14 percent of 1,200 listings times $183 times 365 days). While future hotel taxes will be paid by the visitors who use Airbnb to book lodgings, any back tax obligation presumably would have to come out of Airbnb’s own funds, as it could not retroactively bill guests for the taxes. The San Francisco treasurer’s office last week added new information for vacation-rental hosts and companies on its website, including streamlined forms for tax compliance. San Francisco residents who host exclusively through websites like Airbnb can allow the marketplace to handle all tax collection, reporting and remittance.