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Nonprofit · EIN 83-4029189

MAINSPRING

Tax-exempt · CALEDONIA, MN 55921

Address and contacts

Address (IRS master file)
404 E MAIN ST, CALEDONIA, MN 55921-1363
Mailing address (990-N for 2024)
404 MAIN ST E, CALEDONIA MN 55921
Principal officer (990-N for 2024)
CASSIE RAUK, 10189 STATE 44, CALEDONIA MN 55921

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

IRS record

EIN
83-4029189
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
2019
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2024
Officer: CASSIE RAUK
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Cassie Rauk
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Melissa Wray
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: Melissa Wray
December 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Melissa Wray
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Melissa Wray
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 83-4029189).

Questions about MAINSPRING

What is the EIN of MAINSPRING?
The employer identification number (EIN) of MAINSPRING is 83-4029189.
Is MAINSPRING tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2019.
Are donations to MAINSPRING tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does MAINSPRING file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of MAINSPRING 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 MAINSPRING 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 MAINSPRING?
The 990-N for 2024 names CASSIE RAUK.

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