Can I upload a document to edit from my desktop?

It seems the only option is to import a form from a website.

If you want to upload an Adobe FormsCentral form, please go to this link: https://www.jotform.com/adobe-formscentral-alternative/

If its another third-party form, that will not be possible. However, you can create a form from the scratch in a few minutes just by dragging and dropping fields using our form builder, also you can use the Designer feature to create beautiful forms in real time:

Here are some guides that might be of you interest:

https://www.jotform.com/help/2-How-to-Create-Your-First-Web-Form

https://www.jotform.com/help/34-Adding-a-Form-to-a-Web-Page

https://www.jotform.com/help/25-Setting-Up-Email-Notifications

Once you create the similar structure of your form or Doc, you can import your data into an Excel or CSV file, and use our Import App to import submission into the new form: http://apps.jotform.com/app/import_data

If you need anything else, please open a new thread, we will be glad to assist you