Need help adding additional boxes to enter information

Could you explain your requirement further as I could not find any forms in your account?

In the meantime, you could check out these related guides to create forms:

https://www.jotform.com/help/2-how-to-create-your-first-web-form

https://www.jotform.com/help/chapter-2-create-forms

You may use a Long text field on the form for users to enter additional information.