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Nonprofit · EIN 46-4132511

MAMMO STRONG INC

Tax-exempt · JOLIET, IL 60435

Address and contacts

Address (IRS master file)
1991 CALLA DR, JOLIET, IL 60435-8585
In care of
% SUSAN MAMMOSSER
Mailing address (990-N for 2025)
1991 Calla Drive, Joliet IL 60435
Principal officer (990-N for 2025)
Susan Mammosser, 1991 Calla Drive, Joliet IL 60435

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

Tax yearYear endedDueIRS public records
2025September 30, 2026February 15, 2027990-N on file
2024September 30, 2025February 16, 2026990-N on file
2023September 30, 2024February 17, 2025990-N on file

File the 2026 990-N for MAMMO STRONG INC

Due February 15, 2028 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
46-4132511
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
2014
Accounting year ends
September
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Susan Mammosser
September 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Susan Mammosser
September 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Susan Mammosser
September 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Susan Mammosser
September 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Susan Mammosser
September 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Susan Mommosser
September 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: Susan Mommosser
September 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 46-4132511).

Questions about MAMMO STRONG INC

What is the EIN of MAMMO STRONG INC?
The employer identification number (EIN) of MAMMO STRONG INC is 46-4132511.
Is MAMMO STRONG INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2014.
Are donations to MAMMO STRONG INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does MAMMO STRONG INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of MAMMO STRONG INC due?
The return for tax year 2026 (the year ending September 30, 2027) is due February 15, 2028. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MAMMO STRONG INC last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended September 30, 2026.
Who is the principal officer of MAMMO STRONG INC?
The 990-N for 2025 names Susan Mammosser.

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