How much of your annual income comes from your art, and how much comes from other sources?
What percentage of your time do you actually spend working in your studio? And what do you spend the rest of your life doing to support that time?
Do you belong to any professional associations? If so, why? What are the advantages that membership provides you?
Do you belong to a wider artist's community, beyond any professional associations? What is that community, and why do you participate in it?
Who is your audience? Who buys your work? Does your audience consist of one consistent demographic, or different demographics? How have you expanded your audience over time? How do you market your work?
What sort of education and/or training have you pursued in your career as an artist? Was it worth it? What were the most valuable things you've taken away from your education or training?
Does your art practice have an impact on the way you do your taxes? If so, how?
What sorts of legal issues, if any, have you had to deal with in making or selling your art?