how do I add an email address to PayPal?

Hi,

I am not sure where you would like to add the email address.  In order to change your recipient email addresses please refer to our user guide on How to send notifications to multiple email addresses

The process of changing a single recipient email address on your form notifications is just the same on that user guide.

If you are trying update your PayPal account information, that would need to be done through PayPal:

https://www.paypal.com/us/webapps/helpcenter/helphub/article/?solutionId=FAQ772&m=HTQ

If there is something else you are looking for, let us know and we will be happy to help.