Using Gravity Forms, it is easy to send a copy of the form entry / submission to the person filling out the form.
In WP Admin navigate to Forms and then click on the relevant form. Hover over Settings and click Notifications.
On the next screen, click Edit
On the next screen, find the field Send to Email and enter one of the following, depending on the relevant scenario.
If the person filling out the form is logged in
If the person filling out the form is logged in, you can get their user email address by accessing the {user:user_email} merge tag.
Send to Email {admin_email}, {user:user_email}
If the user filling out the form is not logged in
If the user filling out the form is not logged in but entering their email address then you get the email address they entered by clicking on any of the merge tag dropdowns and selecting the email address field they entered.
This will then give you the field merge tag (E.g. {Email:2}), which you can enter in the Send to Email field.
Send to Email {admin_email}, {Email:2}
Then click Update Notification button to save your changes.
