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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 42-6076609

OPTIMIST INTERNATIONAL

Also known as 40090 OC OF MARSHALLTOWN IA

Tax-exempt · MARSHALLTOWN, IA 50158

Address and contacts

Address (IRS master file)
PO BOX 1236, MARSHALLTOWN, IA 50158-1236
In care of
% LINDA MOORE
Mailing address (990-N for 2024)
PO BOX 1236, MARSHALLTOWN IA 50158
Principal officer (990-N for 2024)
NATHAN MINKEL, PO BOX 1236, MARSHALLTOWN IA 50635

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 15, 2027Not due yet
2024September 30, 2025February 16, 2026990-N on file
2023September 30, 2024February 17, 2025990-N on file

File the 2025 990-N for OPTIMIST INTERNATIONAL

Due February 15, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
42-6076609
Tax-exempt status
501(c)(4): Social welfare organization
Donations deductible
No
Exempt since
1958
Accounting year ends
September
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024
Officer: NATHAN MINKEL
September 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: NATHAN MINKEL
September 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: NATHAN MINKEL
September 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: NATHAN MINKEL
September 30, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Nathan Minkel
September 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Nathan Minkel
September 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: Nathan Minkel
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 42-6076609).

Questions about OPTIMIST INTERNATIONAL

What is the EIN of OPTIMIST INTERNATIONAL?
The employer identification number (EIN) of OPTIMIST INTERNATIONAL is 42-6076609.
Is OPTIMIST INTERNATIONAL tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(4) since 1958.
Are donations to OPTIMIST INTERNATIONAL tax-deductible?
No. The IRS master file says contributions to it are not deductible.
Which annual return does OPTIMIST INTERNATIONAL file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of OPTIMIST INTERNATIONAL due?
The return for tax year 2025 (the year ending September 30, 2026) is due February 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did OPTIMIST INTERNATIONAL 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 OPTIMIST INTERNATIONAL?
The 990-N for 2024 names NATHAN MINKEL.

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