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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 90-0350380

PI MU EPSILON INC

Also known as CALIFORNIA OMICRON CHAPTER

Tax-exempt · CHICO, CA 95929

Address and contacts

Address (IRS master file)
MATH DEPT CALIFORNIA STATE UNIV, CHICO, CA 95929-0001
In care of
% PROF THOMAS MATTMAN
Mailing address (990-N for 2024)
MATH DEPT CALIFORNIA STATE UNIV, CHICO CA 95929
Principal officer (990-N for 2024)
PROF THOMAS MATTMAN, MATH DEPT CALIFORNIA STATE UNIV, CHICO CA 95929

California records

California keeps its own records of charities and corporations. Search them by EIN 90-0350380 or by the name PI MU EPSILON INC.

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 PI MU EPSILON INC

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

IRS record

EIN
90-0350380
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Exempt since
1953
Accounting year ends
June
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024
Officer: PROF THOMAS MATTMAN
June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: PROF THOMAS MATTMAN
June 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: PROF THOMAS MATTMAN
June 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: PROF THOMAS MATTMAN
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: PROF THOMAS MATTMAN
June 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: PROF THOMAS MATTMAN
June 30, 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 90-0350380).

Questions about PI MU EPSILON INC

What is the EIN of PI MU EPSILON INC?
The employer identification number (EIN) of PI MU EPSILON INC is 90-0350380.
Is PI MU EPSILON INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1953.
Which annual return does PI MU EPSILON INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of PI MU EPSILON INC 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 PI MU EPSILON INC 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 PI MU EPSILON INC?
The 990-N for 2024 names PROF THOMAS MATTMAN.

Other nonprofits in CHICO

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