You require following information while setting up a WHMCS license:
Contact Information: Your name, email address, and phone number, if available.
Billing Details: Information about your billing address and payment method.
Domain Information: If you are purchasing a license that is associated with a specific domain, you may be required to submit the domain name throughout the order process.
License Configuration: Depending on your requirements, you may need to choose the type of license (e.g., owned or leased), the number of customers it supports, and any additional features or modules.