I agree with JoAnn that it isn't an easy task -- in Word. But if you have
PowerPoint it isn't TOO hard. It's still a pain in the gluteus maximus and
not something I like to do, but it's possible.
In PowerPoint, you can insert the scanned form as a picture (save it as a
JPG if necessary). Then insert a text box, format it with no line and no
fill, and format it with the font you want your entries to use. (A little
contrast with the form's font is nice.) Then copy that text box to your
clipboard. Then you can paste a copy of the text box over each blank in the
scanned image and enter your response. You can hold down the Ctrl key and use
your arrow keys to move the box a pixel at a time to get them lined up with
the blanks just the way you want.
If some of your text boxes suddenly disappear, they've probably just moved
behind the scanned image. Select the image and use Order to move it to the
back. Then I prefer to select all (Ctrl-A) and group all the objects into a
single group before printing.
I hope this helps, and good luck on getting the job!
Fred