I want to add a tracking-code in the last webseite when the reservation is done, how can i do that

Hello,

This feature is not implemented. But if you let us know, what exactly do you want, we can offer you paid custom support to implement this feature. If you are interested in, let us know on Tato emailová adresa je chráněna před spamboty, abyste ji viděli, povolte JavaScript (copy to Tato emailová adresa je chráněna před spamboty, abyste ji viděli, povolte JavaScript )

Customer is only able to check reservation status at the moment. So he is able to see if order is paid and finished or not.