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Nonprofit · EIN 11-3649873

WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY

Tax-exempt (reinstated) · WATERLOO, WI 53594

Address and contacts

Address (IRS master file)
W8697 ISLAND RD, WATERLOO, WI 53594-9475
In care of
% SETH DAILEY
Mailing address (990-N for 2025)
W8697 Island Road, Waterloo WI 53594
Principal officer (990-N for 2025)
Delight Hensler, W8697 Island Road, Waterloo WI 53594

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, 2025Check at the IRS
2023December 31, 2023May 15, 2024Check at the IRS

File the 2026 990-N for WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY

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

IRS record

EIN
11-3649873
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
2024
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Education (B03)

Revocation and reinstatement

Exemption revoked
May 15, 2023
Posted by the IRS
August 14, 2023
Reinstated
Effective May 15, 2023

From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Delight Hensler
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Delight Hensler
December 31, 2019≤ $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 11-3649873).

Questions about WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY

What is the EIN of WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY?
The employer identification number (EIN) of WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY is 11-3649873.
Is WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY tax-exempt?
Yes. The IRS revoked its exemption on May 15, 2023 and reinstated it effective May 15, 2023.
Are donations to WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY 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 WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY 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 WISCONSIN SOCIETY OF OTOLARYNGOLOGY HEAD AND NECK SURGERY?
The 990-N for 2025 names Delight Hensler.

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