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Nonprofit · EIN 33-1519495

SENTINEL RESEARCH

Tax-exempt · AUSTIN, TX 78705

Address and contacts

Address (IRS master file)
902 W 30TH ST, AUSTIN, TX 78705-2104

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. 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 on file
2024December 31, 2024May 15, 2025990 on file
2023December 31, 2023May 15, 2024No data

IRS record

EIN
33-1519495
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
2025
Accounting year ends
December
Files
Form 990 or 990-EZ
Assets (IRS master file)
$699,824
Income (IRS master file)
$764,034

Filing history

FormYear endedRevenueExpensesAssetsReturn
990December 2025–––IRS
990December 2024–––IRS

990-N: the IRS publishes only the latest e-Postcard per organization; earlier years appear here as 990.tax collects the monthly files. 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.

Questions about SENTINEL RESEARCH

What is the EIN of SENTINEL RESEARCH?
The employer identification number (EIN) of SENTINEL RESEARCH is 33-1519495.
Is SENTINEL RESEARCH tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2025.
Are donations to SENTINEL RESEARCH tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does SENTINEL RESEARCH file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of SENTINEL RESEARCH 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 SENTINEL RESEARCH last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended December 2025.

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