how can I edit an auto reply?

Do you mean an autoresponder?

If so, you should click on the pencil icon of the autoresponder. Then you will be able to adjust the e-mail template and the settings.

You can check and follow these guides:

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

https://eu.jotform.com/help/30-Explanation-of-Email-Notification-and-Autoresponder-Settings

If you meant something else, please let us know.