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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 38-2189177

INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS

Tax-exempt · MENOMONEE FLS, WI 53051

Address and contacts

Address (IRS master file)
W181N8936 MELANIE LN, MENOMONEE FLS, WI 53051-1987
In care of
% CINDY PIEFER
Mailing address (990-N for 2025)
W181 N8936 Melanie Lane, MENOMONEE FALLS WI 53051
Principal officer (990-N for 2025)
Cindy Piefer, W181 N8936 Melanie Lane, MENOMONEE FALLS WI 53051

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, 2025Check at the IRS
2023December 31, 2023May 15, 2024Check at the IRS

File the 2026 990-N for INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS

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

IRS record

EIN
38-2189177
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
1981
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Cindy Piefer
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Mary Kowalski
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: Mary Kowalski
December 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Mary A Kowalski
December 31, 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 38-2189177).

Questions about INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS

What is the EIN of INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS?
The employer identification number (EIN) of INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS is 38-2189177.
Is INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1981.
Are donations to INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS 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 INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS 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 INVITATIONAL CONFERENCE OF INVESTIGATIVE IMMUNOHEMATOLOGISTS?
The 990-N for 2025 names Cindy Piefer.

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