how i add my url to create a page

If you are looking for your forms URL, this thread contains a very detailed explanation of how to do so:

http://www.jotform.com/answers/668928-Where-can-I-find-the-form-URL-of-my-form

If you are trying to embed your form to a webpage, there are several different ways to do so, here are the basics:

http://www.jotform.com/help/67-Which-Form-Embed-Code-Should-I-Use