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Nonprofit · EIN 81-2804603

INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION

Tax-exempt (reinstated) · WORCESTER, MA 01609

Address and contacts

Address (IRS master file)
500 SALISBURY STREET, WORCESTER, MA 01609-1296
In care of
% KEVIN L HICKEY
Mailing address (990-N for 2025)
500 SALISBURY STREET, WORCESTER MA 016091296
Principal officer (990-N for 2025)
DEMETRI KANTARELIS, 500 SALISBURY STREET, WORCESTER MA 016091296

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 June, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025June 30, 2026November 16, 2026990-N on file
2024June 30, 2025November 17, 2025990-N on file
2023June 30, 2024November 15, 2024990-N on file

File the 2026 990-N for INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION

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

IRS record

EIN
81-2804603
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
June
Files
Form 990-N (e-Postcard)
Category (NTEE)
Environment (C03)

Revocation and reinstatement

Exemption revoked
November 15, 2010
Posted by the IRS
November 18, 2017
Reinstated
Effective November 15, 2010

From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: DEMETRI KANTARELIS
June 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: DEMETRI KANTARELIS
June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: KEVIN HICKEY
June 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: KEVIN HICKEY
June 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: KEVIN HICKEY
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: KEVIN HICKEY
June 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: KEVIN HICKEY
June 30, 2019≤ $50,000 receipts––e-Postcard
990-EZJune 2018–––IRS

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 81-2804603).

Questions about INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION

What is the EIN of INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION?
The employer identification number (EIN) of INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION is 81-2804603.
Is INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION tax-exempt?
Yes. The IRS revoked its exemption on November 15, 2010 and reinstated it effective November 15, 2010.
Are donations to INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION due?
The return for tax year 2026 (the year ending June 30, 2027) is due November 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended June 30, 2026.
Who is the principal officer of INTERDISCIPLINARY ENVIRONMENTAL ASSOCIATION?
The 990-N for 2025 names DEMETRI KANTARELIS.

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