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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 45-2852502

MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION

Tax-exempt · SAUSALITO, CA 94965

Address and contacts

Address (IRS master file)
162 PROSPECT AVE, SAUSALITO, CA 94965-2305
Mailing address (990-N for 2024)
162 Prospect Ave, Sausalito CA 94965
Principal officer (990-N for 2024)
John Burton, 162 Prospect Ave, Sausalito CA 94965

California records

California keeps its own records of charities and corporations. Search them by EIN 45-2852502 or by the name MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION.

Attorney General, Registry of Charities and Fundraisers
Registration status and filed reports (CT-TR-1, RRF-1)

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, 2026Not due yet
2024June 30, 2025November 17, 2025990-N on file
2023June 30, 2024November 15, 2024990-N on file

File the 2025 990-N for MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION

Due November 16, 2026 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
45-2852502
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
2011
Accounting year ends
June
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024
Officer: John Burton
June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: John Burton
June 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: John Burton
June 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Anne Wharton
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Douglas Perry
June 30, 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 45-2852502).

Questions about MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION

What is the EIN of MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION?
The employer identification number (EIN) of MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION is 45-2852502.
Is MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2011.
Are donations to MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION due?
The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION last file with the IRS?
The latest return in the IRS public files is the 990-N for 2024 for the year ended June 30, 2025.
Who is the principal officer of MASTER SINFONIA CHAMBER ORCHESTRA ASSOCIATION?
The 990-N for 2024 names John Burton.

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