She did a Q&A right after she hung out with Lady Louise last year. There was an influx of new users on her channel and of course I can't find the video. I remember her saying that most people work off shore and that she would have likely done the same. Not sure where I got the accounting from. Probably mixing that up with her saying she hated it.
Probably because Mrs M has deleted all bar two or three Q&A vlogs there is a link to Q and A vlogs on her YouTube page I'll try and paste it below
https://www.youtube.com/playlist?list=PL6ZRlWvdNYV78ugP7GiZB7AAXjxLLm-eb