Hi Ricki, you can go to your account on your dashboard and see how much you have been paid. Hopefully your account will show payments made by Airbnb for the last 3 years. Failing that, perhaps you could contact Airbnb for help. Bummer that you have to pay back taxes! I fear that many hosts may have to pony up the taxes that are in arrears. I doubt that your locality has any access to your listing stays, but they probably will ask you to provide in writing the amounts you have collected. I pay the transient occupany tax monthly on the gross amount, before Airbnb takes their service fees. Good luck!