That's a super question, Latasha and I thought I knew the answer. Buy I've just looked at previous bookings I've made and can't dind the answer! I know there's an email confirming the booking and the amount paid. I've just looked at some of those and it's not on there either. There is an option to make a request of customer services, so maybe that's how to do it these days
Once you've PAID for a booking on Booking dot com you can get a tax receipt. I guess the rule is to plug that loophole that allows people into Thailand without actually having a clear plan to leave