Property
In booking.com you can setup the taxes per property. You can follow this guide on booking.com to set everything up.
Payouts
Booking.com will show a monthly overview of your payouts. This overview includes the reservation code, guest name, check-in and checkout-dates, total amount, commission, VAT, payment charges and the net income of a reservation.
The VAT that booking.com is showing is not connected to reservations. This is the VAT charged over the commission and payment charges. This VAT charged varies per country or state. The VAT percentage can be calculated using the following formula
(commission + payment charge) / VAT = VAT percentage