I don't know abt audit because I did tax, buh i expect it will be similar. Just make sure you defend your application (all of it, every response you gave and even you essay). D̶̲̥̅̊ε̲̣̣̣̥γ̲̣̣̥ use the same booklet the manager used but I doubt if he will ask you the same question. The interview will be more personal I guess. Just be calm, consistent, sharp, hornest and C☺☺l headed and am sure you will scale throught.
The best of luck,
Cheers