The first is to use OCR (Optical Character Recognition) software to scan the document and convert it into an editable one. Simple OCR is a free option in this category.
The other is to scan the document and open the scanned image in Word, Paint, Photoshop, etc and fill it in using text boxes.
Either way it's free so it can't be beat.
Hope this helps,
I'm looking for software that I can scan a form, fill it out on my computer and then print-out a hard copy all filled out. Any help or suggestions would be appreciated (free or very low cost for use at home). I sure hated to give up that old typewriter- remember them? I have a Dell 9100 computer with Windows XP and using a HP scanner. Thanks again.