The IRS now has a directory in which you can access information about different tax preparers. You can search by zip code, last name or by the type of preparer (attorney, CPA, EA, enrolled actuary, enrolled retirement plan agent, and annual filing season program participant). In order to be listed on the directory you must have a valid PTIN and be one of the above mentioned preparer types. The website also provides information about the different credential types and about how to go about choosing a preparer. You can access the directory by clicking here.