O.k., got it! I was quoted for "professional liability insurance" (E&O) as a bookkeeper through the American Institute of Professional Bookkeepers (
www.aipb.org) for an annual cost of $500. This is a 20% discount from what I was quoted through my State Farm agent. The membership fee to AIPB was only $39/year, so the savings was significant!
My quote was fairly low as I am only pt and have minimal clients at this point. The coverage has a $1k deductible/$100k maximum coverage per incident. I will be purchasing it in April.