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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 51-0154853

CHEYENNE HIGH PLAINS AUDUBON SOCIETY

Tax-exempt · CHEYENNE, WY 82003

Address and contacts

Address (IRS master file)
PO BOX 2502, CHEYENNE, WY 82003-2502
In care of
% CHARLES SENIAWSKI
Mailing address (990-N for 2025)
PO Box 2502, Cheyenne WY 82003
Principal officer (990-N for 2025)
Charles Seniawski, 105 Longs Peak DR, Cheyenne WY 82009

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, 2025Check at the IRS
2023April 30, 2024September 16, 2024990-N on file

File the 2026 990-N for CHEYENNE HIGH PLAINS AUDUBON SOCIETY

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

IRS record

EIN
51-0154853
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
1975
Accounting year ends
April
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Charles Seniawski
April 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Charles Seniawski
April 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Charles Seniawski
April 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Charles Seniawski
April 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Charles Seniawski
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 51-0154853).

Questions about CHEYENNE HIGH PLAINS AUDUBON SOCIETY

What is the EIN of CHEYENNE HIGH PLAINS AUDUBON SOCIETY?
The employer identification number (EIN) of CHEYENNE HIGH PLAINS AUDUBON SOCIETY is 51-0154853.
Is CHEYENNE HIGH PLAINS AUDUBON SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1975.
Are donations to CHEYENNE HIGH PLAINS AUDUBON SOCIETY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does CHEYENNE HIGH PLAINS AUDUBON SOCIETY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of CHEYENNE HIGH PLAINS AUDUBON SOCIETY 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 CHEYENNE HIGH PLAINS AUDUBON SOCIETY 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 CHEYENNE HIGH PLAINS AUDUBON SOCIETY?
The 990-N for 2025 names Charles Seniawski.

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