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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 43-1642748

MISSOURI CAVES AND KARST CONSERVANCY

Tax-exempt · KIRKWOOD, MO 63122

Address and contacts

Address (IRS master file)
1507 COULTER FRST, KIRKWOOD, MO 63122-5566
In care of
% BILL KACEROVSKIS
Mailing address (990-N for 2024)
1507 Coulter Forest, Kirkwood MO 63122
Principal officer (990-N for 2024)
william t kacerovskis, 1507 Coulter Forest, Kirkwood MO 63122

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, 2026Not on file
2024December 31, 2024May 15, 2025990-N on file
2023December 31, 2023May 15, 2024990-N on file

File the 2025 990-N for MISSOURI CAVES AND KARST CONSERVANCY

Due May 15, 2026 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
43-1642748
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1996
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Environment (C30)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024
Officer: william t kacerovskis
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: bill kacerovskis
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: william t kacerovskis
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: William Kacerovskis
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Bill Kacerovskis
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 43-1642748).

Questions about MISSOURI CAVES AND KARST CONSERVANCY

What is the EIN of MISSOURI CAVES AND KARST CONSERVANCY?
The employer identification number (EIN) of MISSOURI CAVES AND KARST CONSERVANCY is 43-1642748.
Is MISSOURI CAVES AND KARST CONSERVANCY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1996.
Are donations to MISSOURI CAVES AND KARST CONSERVANCY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does MISSOURI CAVES AND KARST CONSERVANCY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of MISSOURI CAVES AND KARST CONSERVANCY due?
The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MISSOURI CAVES AND KARST CONSERVANCY last file with the IRS?
The latest return in the IRS public files is the 990-N for 2024 for the year ended December 31, 2024.
Who is the principal officer of MISSOURI CAVES AND KARST CONSERVANCY?
The 990-N for 2024 names william t kacerovskis.

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