Re: CFI\'s - Do you pay your own taxes?
Keep all receipts, invoices, etc. and keep detailed notes on what they were for. For example, if you go to Staples, Office Max, etc to get binders, write a note on there for (student's name), used for, etc. Your CFI insurance should be a write-off (i.e., business expense) since you wouldn't need it if you were not employed as a CFI.
As far as accountants go, find one that will do a free initial consultation with you about what you want and what they can offer. If they know nothing about aviation, find one that does. My accountant happens to do taxes for quite a few military pilots and a few airline pilots, so she has a grasp on what we do.
I definitely agree with John about setting up either an LLC or S-Corp. You may not have very many assets right now, but you also don't want your neck hanging out there to incur a bunch of debt if something happens and you need the corporation to pay, not you (read as house/car/dog taken away).
All these things can be researched on-line at the Small Business Association web-site (
www.sba.org, I think) or look in the phone book for the SBA. They will be able to help you out more.
Remember, we teach people a very expensive and possibly dangerous hobby. Cover your a$$ as much as possible.
Fly safely!!