Finding a tax professional

A thread (http://boards.straightdope.com/sdmb/showthread.php?t=811019) mentioned depreciation recapture, which may affect me if we ever want to sell our rental property. I think, but am not 100% sure, that I’ve been doing the depreciation right in Turbo Tax but did not fully appreciate the recapture consequences.

Anyway, between that and some ESPP and stock option items it is clear to me now that it has been foolish to rely on online tools for as long as we have, and I’d like to work with a tax professional. Finding one seems a daunting task. How do I know that they’re actually going to know about these details and not be some fly by night seasonal worker at H&R Block or something?

Any tips on where to look and what to look for? I’m in Washington State if it matters.