Hi susan
You have to send the form back which you were supplied with, as you rightly point out it has a barcode which is personal to you.
It is perfectly OK for you to type your answers and attach them as extra pages to the form, just make sure that each page has your full name and NIN at the top and that they are numbered, we recommend "page X of Y" so that it is easy to see if pages are missing. Make sure you clearly mark on the form where your answers are and on the relevant page that you are answering question X.
I would not split your answers across the form and attached pages, do one or the other for each activity (not question), splitting it risks the second part of your answer not being read.
Attach the pages to the back of the form using a staple or make a hole in the top left corner and use a treasury tag, string or ribbon to the form. The pages need to be easily detached so that they can be scanned by the DWP.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems
