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Nonprofit · EIN 71-1045966

CALIFORNIA SCIENCE LEAGUE

Tax-exempt · MODESTO, CA 95358

Address and contacts

Address (IRS master file)
PO BOX 580084, MODESTO, CA 95358-0003
In care of
% BARBARA LITTLE
Mailing address (990-N for 2025)
PO Box 580084, Modesto CA 95358
Principal officer (990-N for 2025)
Leisa Turner, PO BOX 580084, Modesto CA 95358

California records

California keeps its own records of charities and corporations. Search them by EIN 71-1045966 or by the name CALIFORNIA SCIENCE LEAGUE.

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

File the 2026 990-N for CALIFORNIA SCIENCE LEAGUE

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

IRS record

EIN
71-1045966
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
2010
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Leisa Turner
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Barbara Little
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Barbara Little
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Barbara Little
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: Barbara Little
December 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Barbara Little
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Barbara Little
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 71-1045966).

Questions about CALIFORNIA SCIENCE LEAGUE

What is the EIN of CALIFORNIA SCIENCE LEAGUE?
The employer identification number (EIN) of CALIFORNIA SCIENCE LEAGUE is 71-1045966.
Is CALIFORNIA SCIENCE LEAGUE tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2010.
Are donations to CALIFORNIA SCIENCE LEAGUE tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does CALIFORNIA SCIENCE LEAGUE file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of CALIFORNIA SCIENCE LEAGUE 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 CALIFORNIA SCIENCE LEAGUE 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 CALIFORNIA SCIENCE LEAGUE?
The 990-N for 2025 names Leisa Turner.

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