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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 81-4362754

WILLOW BROOK HAVEN INC

Tax-exempt · MEQUON, WI 53097

Address and contacts

Address (IRS master file)
10121 W BONNIWELL RD, MEQUON, WI 53097-1901
In care of
% JUDITH A LEIS-PIEPENBURG
Mailing address (990-N for 2025)
10121 W BONNIWELL RD, MEQUON WI 53097
Principal officer (990-N for 2025)
JUDITH LEIS PIEPENBURG, 10121 W BONNIWELL RD, MEQUON WI 53097

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 December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990-N on file
2024December 31, 2024May 15, 2025990-N on file
2023December 31, 2023May 15, 2024Check at the IRS

File the 2026 990-N for WILLOW BROOK HAVEN INC

Due May 17, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
81-4362754
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
2016
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Animal-related (D20)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: JUDITH LEIS PIEPENBURG
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: JUDITH A LEIS-PIEPENBURG
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: JUDITH LEIS-PIEPENBURG
December 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: JUDITH LEIS-PIEPENBURG
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: JUDITH LEIS-PIEPENBURG
December 31, 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 81-4362754).

Questions about WILLOW BROOK HAVEN INC

What is the EIN of WILLOW BROOK HAVEN INC?
The employer identification number (EIN) of WILLOW BROOK HAVEN INC is 81-4362754.
Is WILLOW BROOK HAVEN INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2016.
Are donations to WILLOW BROOK HAVEN INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does WILLOW BROOK HAVEN INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of WILLOW BROOK HAVEN INC due?
The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did WILLOW BROOK HAVEN INC last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended December 31, 2025.
Who is the principal officer of WILLOW BROOK HAVEN INC?
The 990-N for 2025 names JUDITH LEIS PIEPENBURG.

Other nonprofits in MEQUON

All nonprofits in MEQUON · Wisconsin · Animal-related