Does your mock test have specific tricky things in it? Why not just ask how they would handle these?

Do you expect they know ProSeries already? "Testing" on 2018 software seems dumb. A lot has changed since then - both software and tax law. 

Do you think you will get applicants who would sit thru this test? Are you an H&R Block type shop? I think they test if you haven't been thru their course. (At least they used to).

What kind of employee would have their own tax software?