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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 94-6103089

INSTITUTE OF ANDEAN STUDIES

Tax-exempt (reinstated) · BERKELEY, CA 94709

Address and contacts

Address (IRS master file)
PO BOX 9307, BERKELEY, CA 94709-0307
Mailing address (990-N for 2025)
PO Box 9307, Berkeley CA 94709
Principal officer (990-N for 2025)
Christine Hastorf, PO Box 9307, Berkeley CA 94709

California records

California keeps its own records of charities and corporations. Search them by EIN 94-6103089 or by the name INSTITUTE OF ANDEAN STUDIES.

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, 2026990-N on file
2024June 30, 2025November 17, 2025990-N on file
2023June 30, 2024November 15, 2024990-N on file

File the 2026 990-N for INSTITUTE OF ANDEAN STUDIES

Due November 15, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
94-6103089
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
2012
Accounting year ends
June
Files
Form 990-N (e-Postcard)

Revocation and reinstatement

Exemption revoked
May 15, 2011
Posted by the IRS
December 7, 2011
Reinstated
Effective May 15, 2011

From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Christine Hastorf
June 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Christine Hastorf
June 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Sara Becker
June 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: John Rick
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: John Rick
June 30, 2020≤ $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 94-6103089).

Questions about INSTITUTE OF ANDEAN STUDIES

What is the EIN of INSTITUTE OF ANDEAN STUDIES?
The employer identification number (EIN) of INSTITUTE OF ANDEAN STUDIES is 94-6103089.
Is INSTITUTE OF ANDEAN STUDIES tax-exempt?
Yes. The IRS revoked its exemption on May 15, 2011 and reinstated it effective May 15, 2011.
Are donations to INSTITUTE OF ANDEAN STUDIES tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does INSTITUTE OF ANDEAN STUDIES file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of INSTITUTE OF ANDEAN STUDIES due?
The return for tax year 2026 (the year ending June 30, 2027) is due November 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did INSTITUTE OF ANDEAN STUDIES last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended June 30, 2026.
Who is the principal officer of INSTITUTE OF ANDEAN STUDIES?
The 990-N for 2025 names Christine Hastorf.

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