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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 23-7309592

MASON DIXON HISTORICAL SOCIETY INC

Tax-exempt · WESTMINSTER, MD 21158

Address and contacts

Address (IRS master file)
PO BOX 67, WESTMINSTER, MD 21158-0067
Mailing address (990-N for 2025)
PO Box 67, Westminster MD 21157
Principal officer (990-N for 2025)
Roland Mann, PO Box 67, Westminster MD 21157

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 MASON DIXON HISTORICAL SOCIETY INC

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

IRS record

EIN
23-7309592
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
1973
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Roland Mann
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Roland Mann
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Alexander Cooper
December 31, 2023≤ $50,000 receipts––e-Postcard
990-EZDecember 2022–––IRS
990-EZDecember 2021–––IRS
990-EZDecember 2020–––IRS
990-EZDecember 2019–––IRS
990-EZDecember 2018–––IRS
990-N for 2014
Officer: Robert Greismyer
December 31, 2014≤ $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 23-7309592).

Questions about MASON DIXON HISTORICAL SOCIETY INC

What is the EIN of MASON DIXON HISTORICAL SOCIETY INC?
The employer identification number (EIN) of MASON DIXON HISTORICAL SOCIETY INC is 23-7309592.
Is MASON DIXON HISTORICAL SOCIETY INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1973.
Are donations to MASON DIXON HISTORICAL SOCIETY INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does MASON DIXON HISTORICAL SOCIETY INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of MASON DIXON HISTORICAL SOCIETY INC 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 MASON DIXON HISTORICAL SOCIETY INC 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 MASON DIXON HISTORICAL SOCIETY INC?
The 990-N for 2025 names Roland Mann.

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