1. Create custom fields
Under Settings Custom Fields select the People tab. Click fa-arrow-right Add to create the first custom field for the license plate. Select Text Field as the field type, and enter "Vehicle 1" in the "Tab" field - if you want to allow multiple vehicles per customer.
If you need to create multiple vehicles, simply create another one by clicking Copy on the license plate custom field. This will then be displayed separately under the "Vehicle 2" tab.
Create the remaining additional fields based on the screenshot.