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

Robert Jack Sinkowski

CPA · R. Jack Sinkowski, CPA P.C.

Junction City, Oregon 97448

Robert Jack Sinkowski, CPA in Junction City, OR

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Robert Jack Sinkowski, CPA in Junction City · CPA Seek