You can set which information you require your guest to enter when they make a booking. You can set optional/mandatory information, additionally you can set Custom Questions (if required).
Go to {{#fas:cog}} (SETTINGS > ) PROPERTIES > BOOKING QUESTIONS you can identify the Standard Questions and define any additional questions in Custom Questions.
=== How can I change the details in the first line of the Charges & Payments and/or Invoice tab of a booking? ===