I just posted a method to use only Airbnb income amount to determine how much within that amount is TAT and GET. Haven's seen it pop up yet, but you might try it out and see if it is what you are looking for.
I use the Tax Department pamphlet "An Introduction to the Hawaii Transient Accommodations Tax" April, 2016 and the section on "visible disclosures".
When Airbnb tells me the money is headed to my bank, I use the amount as "Gross Rental Income*" and work backwards to determine GET/TAT. Then I email my tenant showing amounts he has paid.
* Gross Rental Income = Pmt Received / (1+(.0925+.0450))
Dean