PageLines DMS does not have its own form generating system so you will need to use the form plugin of your choice.  In this case we have used the free Contact Form 7 plugin to generate the form you see on this page.  You can also try Formidable, Gravity Forms or Ninja Forms as alternatives.  The premium contact form plugins like Gravity Forms include many add-ons like MailChimp integration, etc., so check them out.