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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 46-5323776

ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC

Tax-exempt · MADISON, WI 53708

Address and contacts

Address (IRS master file)
PO BOX 8444, MADISON, WI 53708-8444
In care of
% THOMAS CONRAD SOLBERG
Mailing address (990-N for 2025)
PO BOX 8444, Madison WI 53708
Principal officer (990-N for 2025)
Marie Askey, E11872 Dam Heights Rd, Prairie Du SAC WI 53578

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 ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC

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

IRS record

EIN
46-5323776
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
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Environment (C30)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Marie Askey
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: William
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: TOM SOLBERG
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: William Stehling
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: William Stehling
December 31, 2018≤ $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 46-5323776).

Questions about ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC

What is the EIN of ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC?
The employer identification number (EIN) of ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC is 46-5323776.
Is ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2014.
Are donations to ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of ANCIENT EARTHWORKS SOCIETY OF WISCONSIN 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 ANCIENT EARTHWORKS SOCIETY OF WISCONSIN 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 ANCIENT EARTHWORKS SOCIETY OF WISCONSIN INC?
The 990-N for 2025 names Marie Askey.

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