Ms. Client lost big in the stock market during 2019. Now, at tax time, she insists that she is (or was during 2019) a day trader and therefore can treat her stock market net loss as a Schedule C ordinary loss rather than as a basically worthless net capital loss. In anticipation of a meeting with Ms. Client, prepare a due diligence checklist / questionnaire (or just a note to self) to guide the discussion and to help you get to an independent professional judgment regarding Ms. Clients 2019 status as either a trader or an investor.