What do I need for an application for provisional patent?

[chansomps]

I am going to file an application for a provisional pantent online (EFS-Web). There is a part of the application that asks to attach documents, but I don't know which documents to attach. So far, I think I need: Specification, Cover Letter and Application Data Sheet.

[hurst]

Yes. That is right. I wrote a free guide with images here that you can use: http://patentfile.org/filing-provisional-patent-at-uspto/