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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 20-5222159

DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC

Tax-exempt · SACRAMENTO, CA 95814

Address and contacts

Address (IRS master file)
555 CAPITOL MALL STE 1500, SACRAMENTO, CA 95814-4603
In care of
% HEIDELORE FIEDLER
Mailing address (990-N for 2023)
555 Capitol Mall Suite 1500, Sacramento CA 95814
Principal officer (990-N for 2023)
Heidelore Fiedler, 555 Capitol Mall Suite 1500, Sacramento CA 95814

California records

California keeps its own records of charities and corporations. Search them by EIN 20-5222159 or by the name DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC.

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, 2026Not on file
2024December 31, 2024May 15, 2025Not on file
2023December 31, 2023May 15, 2024990-N on file

File the 2025 990-N for DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC

Due May 15, 2026 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
20-5222159
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2006
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Health care (E038)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2023
Officer: Heidelore Fiedler
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Heidelore Fiedler
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Michael Steven Denison
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Michael S Denison
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 20-5222159).

Questions about DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC

What is the EIN of DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC?
The employer identification number (EIN) of DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC is 20-5222159.
Is DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2006.
Are donations to DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC due?
The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC last file with the IRS?
The latest return in the IRS public files is the 990-N for 2023 for the year ended December 31, 2023.
Who is the principal officer of DIOXIN20XX INTERNATIONAL DIOXINSYMPOSIA INC?
The 990-N for 2023 names Heidelore Fiedler.

Other nonprofits in SACRAMENTO

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