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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 16-1406021

INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION

Tax-exempt · ROCHESTER HLS, MI 48306

Address and contacts

Address (IRS master file)
2399 WESTWOOD DR, ROCHESTER HLS, MI 48306-3172
In care of
% BEVERLY K BERGER
Mailing address (990-N for 2025)
2399 Westwood Drive, Rochester Hills MI 48306
Principal officer (990-N for 2025)
David Garfinkle, 2399 Westwood Drive, Rochester Hills MI 48306

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 INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION

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

IRS record

EIN
16-1406021
Tax-exempt status
501(c)(6): Business league or chamber of commerce
Donations deductible
No
Exempt since
2015
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: David Garfinkle
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: David Garfinkle
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: David Garfinkle
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: DAVID GARFINKLE
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Beverly Berger
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Beverly Berger
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 16-1406021).

Questions about INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION

What is the EIN of INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION?
The employer identification number (EIN) of INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION is 16-1406021.
Is INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 2015.
Are donations to INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION tax-deductible?
No. The IRS master file says contributions to it are not deductible.
Which annual return does INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION 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 INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION 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 INTERNATIONAL SOCIETY ON GENERAL RELATIVITY ANS GRAVITATION?
The 990-N for 2025 names David Garfinkle.

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