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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 04-3107463

MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC

Tax-exempt · BROOKLINE, MA 02446

Address and contacts

Address (IRS master file)
PO BOX 1821, BROOKLINE, MA 02446-0015
In care of
% HAROLD KATZMAN
Mailing address (990-N for 2024)
PO box 1821, BROOKLINE MA 02446
Principal officer (990-N for 2024)
Hal Katzman, PO Box 1821, Brookline MA 02466

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

Tax yearYear endedDueIRS public records
2025May 31, 2026October 15, 2026Not on file
2024May 31, 2025October 15, 2025990-N on file
2023May 31, 2024October 15, 2024990-N on file

File the 2025 990-N for MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC

Due October 15, 2026 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
04-3107463
Tax-exempt status
501(c)(7): Social or recreational club
Donations deductible
No
Exempt since
1993
Accounting year ends
May
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024
Officer: Hal Katzman
May 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: harold Katzman
May 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: ANNE SEBASTYIAN
May 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Harold Katzman
May 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: HAROLD KATZMAN
May 31, 2020≤ $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 04-3107463).

Questions about MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC

What is the EIN of MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC?
The employer identification number (EIN) of MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC is 04-3107463.
Is MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(7) since 1993.
Are donations to MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC tax-deductible?
No. The IRS master file says contributions to it are not deductible.
Which annual return does MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC due?
The return for tax year 2025 (the year ending May 31, 2026) is due October 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC last file with the IRS?
The latest return in the IRS public files is the 990-N for 2024 for the year ended May 31, 2025.
Who is the principal officer of MOSAIC OUTDOOR MOUNTAIN CLUB OF MASSACHUSETTS INC?
The 990-N for 2024 names Hal Katzman.

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