Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 84-6030992

COLORADO MINERAL SOCIETY

Tax-exempt · LAKEWOOD, CO 80228

Address and contacts

Address (IRS master file)
PO BOX 280755, LAKEWOOD, CO 80228-0755
In care of
% EVA SIEMONSMA
Mailing address (990-N for 2024)
PO BOX 280755, Lakewood CO 80228
Principal officer (990-N for 2024)
Amber Brenzikofer, PO Box 280755, Lakewood CO 80228

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

Tax yearYear endedDueIRS public records
2025September 30, 2026February 16, 2027Not due yet
2024September 30, 2025February 17, 2026990-N on file
2023September 30, 2024February 18, 2025990-N on file

File the 2025 990-N for COLORADO MINERAL SOCIETY

Due February 16, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
84-6030992
Tax-exempt status
501(c)(7): Social or recreational club
Donations deductible
No
Exempt since
1950
Accounting year ends
September
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024
Officer: Amber Brenzikofer
September 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Amber Brenzikofer
September 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Amber Brenzikofer
September 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Debra Kalscheur
September 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Debra Kalscheur
September 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: Debra Kalscheur
September 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 84-6030992).

Questions about COLORADO MINERAL SOCIETY

What is the EIN of COLORADO MINERAL SOCIETY?
The employer identification number (EIN) of COLORADO MINERAL SOCIETY is 84-6030992.
Is COLORADO MINERAL SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(7) since 1950.
Are donations to COLORADO MINERAL SOCIETY tax-deductible?
No. The IRS master file says contributions to it are not deductible.
Which annual return does COLORADO MINERAL SOCIETY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of COLORADO MINERAL SOCIETY due?
The return for tax year 2025 (the year ending September 30, 2026) is due February 16, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did COLORADO MINERAL SOCIETY last file with the IRS?
The latest return in the IRS public files is the 990-N for 2024 for the year ended September 30, 2025.
Who is the principal officer of COLORADO MINERAL SOCIETY?
The 990-N for 2024 names Amber Brenzikofer.

Other nonprofits in LAKEWOOD

All nonprofits in LAKEWOOD · Colorado