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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 81-5412428

STEM ACTION TEEN INSTITUTION

Tax-exempt · HACIENDA HTS, CA 91745

Address and contacts

Address (IRS master file)
2421 RIO BRANCA DR, HACIENDA HTS, CA 91745-4826
In care of
% YIH GIUN SIOW
Mailing address (990-N for 2025)
2421 RIO BRANCA DR, HACIENDA HEIGHTS CA 91745
Principal officer (990-N for 2025)
YIH SIOW, 2421 RIO BRANCA DR, HACIENDA HEIGHTS CA 91745

California records

California keeps its own records of charities and corporations. Search them by EIN 81-5412428 or by the name STEM ACTION TEEN INSTITUTION.

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 STEM ACTION TEEN INSTITUTION

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

IRS record

EIN
81-5412428
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
2017
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Education (B20)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: YIH SIOW
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: yih siow
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: yih siow
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: yih siow
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: YIH SIOW
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: YIH SIOW
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 81-5412428).

Questions about STEM ACTION TEEN INSTITUTION

What is the EIN of STEM ACTION TEEN INSTITUTION?
The employer identification number (EIN) of STEM ACTION TEEN INSTITUTION is 81-5412428.
Is STEM ACTION TEEN INSTITUTION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2017.
Are donations to STEM ACTION TEEN INSTITUTION tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does STEM ACTION TEEN INSTITUTION file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of STEM ACTION TEEN INSTITUTION 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 STEM ACTION TEEN INSTITUTION 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 STEM ACTION TEEN INSTITUTION?
The 990-N for 2025 names YIH SIOW.

Other nonprofits in HACIENDA HTS

All nonprofits in HACIENDA HTS · California · Education