Hey Diana,
Thanks for using our plugins and for reaching out!
Here on the pre-sales forum, I’m afraid we do not provide technical support. I would ask that you take any technical support questions across to our wordpress.org forum – our staff scan it periodically and other community members may also be able to help out.
The Events Calendar
Event Tickets and Registration
If you have purchased a plugin from us, please login and post in the premium forums for that plugin and we can help you out there:
https://theeventscalendar.com/support/forums/
To get you started on your question: ET+ doesn’t have the functionality of adding custom data / text in the email out of the box. However, that can be achieved with a bit of customization. These articles should help you get started:
https://theeventscalendar.com/knowledgebase/themers-guide/
https://theeventscalendar.com/knowledgebase/template-overview/
Thanks again and cheers,
Andras