If the aim is just to fill a paper form, then scan the form to a graphic, such as JPG, format. Then insert the image full size in the header view of a plain document. Set the wrap to 'behind text'. Close the header view then (preferably) using a borderless table fill the form in the main document layer. Repeat for each page. Print on your pre-printed form with the option not to print graphics set. It is simply not worth the effort otherwise - unless you have Adobe Acrobat to create a form from yoir PDF.

__________________
Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com