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-illinois-extract.csv No state license number is on file. Specialties are blank until this preparer claims the listing. CPA Seek does not contact preparers.

Lawrence John Mazzeffi

CPA · Mazzeffi & Company

Schaumburg, Illinois 60193

Lawrence John Mazzeffi, CPA in Schaumburg, IL

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Lawrence John Mazzeffi, CPA in Schaumburg · CPA Seek