Bitrix 17 version - how to change the transmitted data in a receipt?

Question

1C-Bitrix

Please help me understand the principle of data transfer for printing a receipt - a new functionality from version 17.
Logically, I hoped that somewhere in the handlers should be.
Where is the data transmitted?
The task is not to print the cost of goods with 0 in the receipt.
It is also necessary to add data - for example, the user's phone number