Wayne,

Given that many IRS audits of self employed people and consultants involve rather esoteric tax issues like maintaining proper separation between business and personal expenses and maintaining proper business entity documentation I would suggest that you should seriously consider a tax attorney rather than a CPA. I recommend Gordon Baker in Walnut Creek http://rgbestateattorney.com/ .

Be aware that this is the worst possible month of the year for finding and engaging any sort of tax professional. They are always totally booked in the weeks before the 15th and usually take a couple of weeks off after the 15th. The timing of your audit notice may very well not be accidental.

Good luck,

Carl