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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 36-4261965

HINSDALE SOUTH HIGH SCHOOL FOUNDATION

Tax-exempt · DARIEN, IL 60561

Address and contacts

Address (IRS master file)
7401 CLARENDON HILLS RD, DARIEN, IL 60561-4288
In care of
% KIM WENKUS
Mailing address (990-N for 2025)
7401 CLARENDON HILLS ROAD, DARIEN IL 605614288
Principal officer (990-N for 2025)
MARY VOLK, 6525 BARCLAY CT, DOWNERS GROVE IL 60516

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, 2024Check at the IRS

File the 2026 990-N for HINSDALE SOUTH HIGH SCHOOL FOUNDATION

Due November 15, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
36-4261965
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1999
Accounting year ends
June
Files
Form 990-N (e-Postcard)
Category (NTEE)
Education (B112)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: MARY VOLK
June 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: KIM WENKUS
June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: KIM WENKUS
June 30, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: KIM WENKUS
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: KIM WENKUS
June 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2017
Officer: KIM WENKUS
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 36-4261965).

Questions about HINSDALE SOUTH HIGH SCHOOL FOUNDATION

What is the EIN of HINSDALE SOUTH HIGH SCHOOL FOUNDATION?
The employer identification number (EIN) of HINSDALE SOUTH HIGH SCHOOL FOUNDATION is 36-4261965.
Is HINSDALE SOUTH HIGH SCHOOL FOUNDATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1999.
Are donations to HINSDALE SOUTH HIGH SCHOOL FOUNDATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does HINSDALE SOUTH HIGH SCHOOL FOUNDATION file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of HINSDALE SOUTH HIGH SCHOOL FOUNDATION 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 HINSDALE SOUTH HIGH SCHOOL FOUNDATION 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 HINSDALE SOUTH HIGH SCHOOL FOUNDATION?
The 990-N for 2025 names MARY VOLK.

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