how do I copy a form and past it into another

Hi,

If you mean copy a form to another account, that's possible using clone feature. Here's a guide: http://www.jotform.com/help/28-Cloning-a-Form-from-a-Web-Page

However if you mean copy fields from a form to another, use this app: http://apps.jotform.com/app/field_manager

Let us know should you have further questions. Thank you!