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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 39-1402466

WINNEBAGO AUDUBON SOCIETY INC

Tax-exempt · OSHKOSH, WI 54902

Address and contacts

Address (IRS master file)
136 W 18TH AVE, OSHKOSH, WI 54902-6940
In care of
% MIKE BRANDEL
Mailing address (990-N for 2025)
136 W 18th Avenue, Oshkosh WI 54902
Principal officer (990-N for 2025)
Kelli Bahls, 136 W 18th Avenue, Oshkosh WI 54902

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

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

File the 2026 990-N for WINNEBAGO AUDUBON SOCIETY INC

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

IRS record

EIN
39-1402466
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
1982
Accounting year ends
April
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Kelli Bahls
April 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Michael Brandel
April 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Zaiga Freivalds
April 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Zaiga Freivalds
April 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Zaiga Freivalds
April 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Zaiga Freivalds
April 30, 2020≤ $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 39-1402466).

Questions about WINNEBAGO AUDUBON SOCIETY INC

What is the EIN of WINNEBAGO AUDUBON SOCIETY INC?
The employer identification number (EIN) of WINNEBAGO AUDUBON SOCIETY INC is 39-1402466.
Is WINNEBAGO AUDUBON SOCIETY INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1982.
Are donations to WINNEBAGO AUDUBON SOCIETY INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does WINNEBAGO AUDUBON SOCIETY INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of WINNEBAGO AUDUBON SOCIETY INC due?
The return for tax year 2026 (the year ending April 30, 2027) is due September 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did WINNEBAGO AUDUBON SOCIETY INC last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended April 30, 2026.
Who is the principal officer of WINNEBAGO AUDUBON SOCIETY INC?
The 990-N for 2025 names Kelli Bahls.

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