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Nonprofit · EIN 45-4000579

REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY

Tax-exempt · FORTUNA, CA 95540

Address and contacts

Address (IRS master file)
3448 NELSON LN, FORTUNA, CA 95540-1726
In care of
% THOMAS GRUNDMAN
Mailing address (990-N for 2025)
3448 Nelson Lane, Fortuna CA 95540
Principal officer (990-N for 2025)
Thomas Grundman, 3448 Nelson Lane, Fortuna CA 95540

California records

California keeps its own records of charities and corporations. Search them by EIN 45-4000579 or by the name REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY.

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 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

IRS record

EIN
45-4000579
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
2012
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Thomas Grundman
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Thomas Grundman
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Thomas Grundman
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: THOMAS GRUNDMAN
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: THOMAS GRUNDMAN
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: THOMAS GRUNDMAN
December 31, 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 45-4000579).

Questions about REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY

What is the EIN of REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY?
The employer identification number (EIN) of REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY is 45-4000579.
Is REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2012.
Are donations to REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY 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 REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY 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 REDWOODS MUSEUM OF CULTURE AND NATURAL HISTORY?
The 990-N for 2025 names Thomas Grundman.

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