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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 23-7204477

AMERICAN CHEMICAL SOCIETY

Also known as LACROSSE WINONA SECTION

Tax-exempt · LA CROSSE, WI 54601

Address and contacts

Address (IRS master file)
1725 STATE ST, LA CROSSE, WI 54601-3742
In care of
% DR JOSEPH K WEST
Mailing address (990-N for 2025)
1725 State St, La Crosse WI 54601
Principal officer (990-N for 2025)
Ressano De Souza-Machado, 418 N 4th St, La Crescent MN 55947

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 AMERICAN CHEMICAL SOCIETY

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

IRS record

EIN
23-7204477
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Exempt since
1972
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Ressano De Souza-Machado
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Valeria Stepanova
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Ressano Machado
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Jonathan Mauser
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Valeria Stepanova
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Jonathon Mauser
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 23-7204477).

Questions about AMERICAN CHEMICAL SOCIETY

What is the EIN of AMERICAN CHEMICAL SOCIETY?
The employer identification number (EIN) of AMERICAN CHEMICAL SOCIETY is 23-7204477.
Is AMERICAN CHEMICAL SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1972.
Which annual return does AMERICAN CHEMICAL SOCIETY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of AMERICAN CHEMICAL 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 AMERICAN CHEMICAL 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 AMERICAN CHEMICAL SOCIETY?
The 990-N for 2025 names Ressano De Souza-Machado.

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