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Nonprofit · EIN 16-1532135

CLARKSON HISTORICAL SOCIETY

Tax-exempt · CLARKSON, NY 14430

Address and contacts

Address (IRS master file)
PO BOX 600, CLARKSON, NY 14430-0600
In care of
% MARY G EDWARDS
Mailing address (990-N for 2025)
PO BOX 600, Clarkson NY 14430
Principal officer (990-N for 2025)
Anita O'Brien, PO BOX 600, Clarkson NY 14430

What it must file and when

IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. Its accounting year ends in June, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025June 30, 2026November 16, 2026990-N on file
2024June 30, 2025November 17, 2025990-N on file
2023June 30, 2024November 15, 2024990-N on file

IRS record

EIN
16-1532135
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2003
Accounting year ends
June
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Anita O'Brien
June 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Anita O'Brien
June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Jill Paladino
June 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Jackie Smith
June 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Jackie Smith
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Jackie Smith
June 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2017
Officer: Charles Edwards
June 30, 2018≤ $50,000 receipts––e-Postcard

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 16-1532135).

Questions about CLARKSON HISTORICAL SOCIETY

What is the EIN of CLARKSON HISTORICAL SOCIETY?
The employer identification number (EIN) of CLARKSON HISTORICAL SOCIETY is 16-1532135.
Is CLARKSON HISTORICAL SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2003.
Are donations to CLARKSON HISTORICAL SOCIETY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does CLARKSON HISTORICAL SOCIETY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of CLARKSON HISTORICAL SOCIETY due?
The return for tax year 2026 (the year ending June 30, 2027) is due November 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did CLARKSON HISTORICAL SOCIETY last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended June 30, 2026.
Who is the principal officer of CLARKSON HISTORICAL SOCIETY?
The 990-N for 2025 names Anita O'Brien.

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