STR guest on Booking.com needs an invoice

[Nathan Froehlich]

I'm a new STR host and have my first guest asking for an invoice by the time they check out. They booked through Booking.com and this will be my first booking from Booking.com so I already don't know what kind of information I'll have access to. Booking.com says they are not responsible for providing a legal invoice, but they facilitate the payment. I get that we can make up an invoice in Excel, but isn't there some way to automate this type of thing?