This field allows you to specify the URL that will appear on the report page if you have not set the redirect field.. It is useful if you allow the user to receive the form response after submission, but still want to provide link back to your main page. You may set the text of the link in the return_link_title field.
<input type="hidden" name="return_link_url" value="http:// your.example.com/main.html" />