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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 55-6030137

LAMBDA KAPPA SIGMA INTERNATIONAL

Also known as 35 ALPHA OMICRON

Tax-exempt · MUSKEGO, WI 53150

Address and contacts

Address (IRS master file)
PO BOX 570, MUSKEGO, WI 53150-0570
In care of
% MANAGING DIRECTOR
Mailing address (990-N for 2024)
PO BOX 570, MUSKEGO WI 53150

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, 2026Not due yet
2024June 30, 2025November 17, 2025990-N on file
2023June 30, 2024November 15, 2024990-N on file

File the 2025 990-N for LAMBDA KAPPA SIGMA INTERNATIONAL

Due November 16, 2026 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
55-6030137
Tax-exempt status
501(c)(7): Social or recreational club
Donations deductible
No
Exempt since
1967
Accounting year ends
June
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: JOAN ROGALA
June 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022June 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: JOAN ROGALA
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: JOAN ROGALA
June 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: JOAN ROGALA
June 30, 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 55-6030137).

Questions about LAMBDA KAPPA SIGMA INTERNATIONAL

What is the EIN of LAMBDA KAPPA SIGMA INTERNATIONAL?
The employer identification number (EIN) of LAMBDA KAPPA SIGMA INTERNATIONAL is 55-6030137.
Is LAMBDA KAPPA SIGMA INTERNATIONAL tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(7) since 1967.
Are donations to LAMBDA KAPPA SIGMA INTERNATIONAL tax-deductible?
No. The IRS master file says contributions to it are not deductible.
Which annual return does LAMBDA KAPPA SIGMA INTERNATIONAL file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of LAMBDA KAPPA SIGMA INTERNATIONAL due?
The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did LAMBDA KAPPA SIGMA INTERNATIONAL last file with the IRS?
The latest return in the IRS public files is the 990-N for 2024 for the year ended June 30, 2025.

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