How do I allow a person who has submitted a form to receive a copy of the submission returned to them via email?

Thanks

Hello David,

You can setup an Autoresponder email in your form for this purpose:

https://www.jotform.com/help/26-Setting-up-an-Autoresponder-Email 

This will send an email to your form submitter after submission.

Do test and let us know if you have any further questions.