How can I add more then one PDF doc to one file to be filled out together?

Greetings,

I'm sorry but your request is not that clear, if you mean you want to import several PDF files to build a fillable form, then unfortunately this is not possible, it's only allowed to import a single PDF file to build a form or fillable document.
Related guide: https://www.jotform.com/help/548-how-can-i-import-my-own-pdf-with-smart-pdf-forms

If this is not what you meant with your question then please elaborate more details regarding your request so we can help you.

Let us know if you need further assistance.