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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 82-2813478

FOUNDATION FOR ADDIES RESEARCH

Tax-exempt · AURORA, CO 80015

Address and contacts

Address (IRS master file)
22358 E IDA PL, AURORA, CO 80015-4587
In care of
% ADDIES RESEARCH
Mailing address (990-N for 2025)
22358 E Ida Pl, Aurora CO 80015
Principal officer (990-N for 2025)
Christina Stiverson, 22358 E Ida Pl, Aurora CO 80015

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 FOUNDATION FOR ADDIES RESEARCH

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

IRS record

EIN
82-2813478
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
2017
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Medical research (H30)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Christina Stiverson
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Christina Stiverson
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Christina Stiverson
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Christina Stiverson
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Christina Stiverson
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Christina Stiverson
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 82-2813478).

Questions about FOUNDATION FOR ADDIES RESEARCH

What is the EIN of FOUNDATION FOR ADDIES RESEARCH?
The employer identification number (EIN) of FOUNDATION FOR ADDIES RESEARCH is 82-2813478.
Is FOUNDATION FOR ADDIES RESEARCH tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2017.
Are donations to FOUNDATION FOR ADDIES RESEARCH tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does FOUNDATION FOR ADDIES RESEARCH file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of FOUNDATION FOR ADDIES 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 FOUNDATION FOR ADDIES RESEARCH 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 FOUNDATION FOR ADDIES RESEARCH?
The 990-N for 2025 names Christina Stiverson.

Other nonprofits in AURORA

All nonprofits in AURORA · Colorado · Medical research