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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 26-0086457

COLORADO ARCHAEOLOGICAL SOCIETY

Also known as COLORADO ROCK ART ASSOCIATION

Tax-exempt · CENTER, CO 81125

Address and contacts

Address (IRS master file)
481 E COUNTY ROAD 8 N, CENTER, CO 81125-9623
In care of
% ROBERT TIPTON
Mailing address (990-N for 2025)
481 E County Road 8 N, Center CO 81125
Principal officer (990-N for 2025)
Darwin Thompson, 481 E County Road 8N, Center CO 81125

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, 2024990-N on file

File the 2026 990-N for COLORADO ARCHAEOLOGICAL SOCIETY

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

IRS record

EIN
26-0086457
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Exempt since
1985
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Darwin Thompson
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Darwin Thompson
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Darwin Thompson
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Darwin Thompson
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: Darwin Thompson
December 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Randy Tatroe
December 31, 2019≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: Randy Tatroe
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 26-0086457).

Questions about COLORADO ARCHAEOLOGICAL SOCIETY

What is the EIN of COLORADO ARCHAEOLOGICAL SOCIETY?
The employer identification number (EIN) of COLORADO ARCHAEOLOGICAL SOCIETY is 26-0086457.
Is COLORADO ARCHAEOLOGICAL SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1985.
Which annual return does COLORADO ARCHAEOLOGICAL SOCIETY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of COLORADO ARCHAEOLOGICAL SOCIETY 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 COLORADO ARCHAEOLOGICAL SOCIETY 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 COLORADO ARCHAEOLOGICAL SOCIETY?
The 990-N for 2025 names Darwin Thompson.

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