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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 94-2675409

CONSTRUCTION SPECIFICATIONS INSTITUTE

Also known as REDWOOD EMPIRE

Tax-exempt · SANTA ROSA, CA 95402

Address and contacts

Address (IRS master file)
PO BOX 841, SANTA ROSA, CA 95402-0841
In care of
% STEVE PESTELL REDWOOD EMPIRE CSI
Mailing address (990-N for 2024)
PO Box 841, Santa Rosa CA 95402
Principal officer (990-N for 2024)
Michael Seifert, Po Box 841, Santa Rosa CA 95402

California records

California keeps its own records of charities and corporations. Search them by EIN 94-2675409 or by the name CONSTRUCTION SPECIFICATIONS INSTITUTE.

Attorney General, Registry of Charities and Fundraisers
Registration status and filed reports (CT-TR-1, RRF-1)

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 CONSTRUCTION SPECIFICATIONS INSTITUTE

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

IRS record

EIN
94-2675409
Tax-exempt status
501(c)(6): Business league or chamber of commerce
Donations deductible
No
Exempt since
1980
Accounting year ends
June
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024
Officer: Michael Seifert
June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Michael Seifert
June 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Michael Seifert
June 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: Carolyn Glanton
June 30, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Carolyn Glanton
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Jane Rozga
June 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 94-2675409).

Questions about CONSTRUCTION SPECIFICATIONS INSTITUTE

What is the EIN of CONSTRUCTION SPECIFICATIONS INSTITUTE?
The employer identification number (EIN) of CONSTRUCTION SPECIFICATIONS INSTITUTE is 94-2675409.
Is CONSTRUCTION SPECIFICATIONS INSTITUTE tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 1980.
Are donations to CONSTRUCTION SPECIFICATIONS INSTITUTE tax-deductible?
No. The IRS master file says contributions to it are not deductible.
Which annual return does CONSTRUCTION SPECIFICATIONS INSTITUTE file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of CONSTRUCTION SPECIFICATIONS INSTITUTE 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 CONSTRUCTION SPECIFICATIONS INSTITUTE 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.
Who is the principal officer of CONSTRUCTION SPECIFICATIONS INSTITUTE?
The 990-N for 2024 names Michael Seifert.

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