Listed as a CPA in IRS public preparer records. Source: IRS PTIN FOIA extract (Feb 2026), retrieved October 23, 2026. https://www.irs.gov/pub/foia/foia-michigan-extract.csv No state license number is on file. Specialties are blank until this preparer claims the listing. CPA Seek does not contact preparers.

William Paul Hallmann

CPA · Hallmann Advisors, CPAs, P.C.

Clarkston, Michigan 48348

William Paul Hallmann, CPA in Clarkston, MI

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William Paul Hallmann, CPA in Clarkston · CPA Seek