I'm not sure if the question is clear, I'll try to explain.
This client asked for some branding sort of work which includes, on top of regular header/footer letterheads, some files with fields which will be filled.
The client is in the nutritionist field and she was looking to make her clients files more interesting looking.
I worked in Illustrator and I am not sure how I can make files which contain fields she can fill in a Word Document (client clearly won't use Illustrator to edit files). She has also told me she intends to print out these files and fill them out manually too.
Even if I exported the Ai files as images and placed them as backgrounds within Word, I don't think that is the most effective way. Placing text boxes over the fields that need to be filled sounds messy and I feel that on transfer from computer to computer they could get all messed up.
I don't even know if what I'm trying to do is possible (at least to my level of skill or with the software we're limited to), so I'm considering telling her I won't be able to do the editable files, but maybe there's a way I'm not aware of.