To make a check box in a document in M$Word, you can either insert a graphic of a square, or a soft-copy clickable check box. The only graphic of a square that I've been able to find is kind of shitty, the soft-copy clickable boxes are actually nicer. This article describes both methods. I've been using the square under "Geometric Shapes" while this article describes finding one in "Wingdings" so maybe this is better:
https://www.top-password.com/blog/insert-a-check-box-in-word-2016/