How can I create a registration form which sends an auto response with either a link to a form or an attached form?

You only need to set up the autoresponder on your form if you want to have an autoresponsense when they submit the form.

• https://www.jotform.com/help/26-setting-up-an-autoresponder-email

You can also edit the notification and autoresponder email template, please refer to the guide below.

• how-to-edit-the-email-template-for-notifications-and-autoresponders