How do I upload a document as a PDF file?

If you have a copy of the document that is not in electronic format, you will need to scan and save the document.  With some operating systems, you can save that file as (Save As)  PDF.  If you do not have that capability, there are several free online programs to allow you to convert the file to a PDF document.  Your school guidance office or computer lab should have a digital scanner that you may use.  Another option is to go to your local library or an office suppy store, and they usually offer scanning services for a small fee.