Nonprofit · EIN 99-3008787
SCIENTISTS IN SOLIDARITY INC
Also known as SCIENTISTS IN SOLIDARITY
Tax-exempt · BROOKLINE, MA 02446
Address and contacts
- Address (IRS master file)
- 14 MARION ST APT 44, BROOKLINE, MA 02446-4452
- In care of
- % KATHERINE SUAREZ
- Mailing address (990-N for 2024)
- 14 MARION ST APT 44, BROOKLINE MA 02446
- Principal officer (990-N for 2024)
- Arnold Castaneda, 201 Concord Turnpike Apt 2610, Cambridge MA 02140
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 year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | June 30, 2026 | November 16, 2026 | Not due yet |
| 2024 | June 30, 2025 | November 17, 2025 | 990-N on file |
| 2023 | June 30, 2024 | November 15, 2024 | 990-N on file |
IRS record
- EIN
- 99-3008787
- 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
- 2024
- Accounting year ends
- June
- Files
- Form 990-N (e-Postcard)
- Category (NTEE)
- Education (B90)
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-N for 2024 Officer: Arnold Castaneda | June 30, 2025 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2023 Officer: Katherine Suarez | June 30, 2024 | ≤ $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 99-3008787).
Questions about SCIENTISTS IN SOLIDARITY INC
- What is the EIN of SCIENTISTS IN SOLIDARITY INC?
- The employer identification number (EIN) of SCIENTISTS IN SOLIDARITY INC is 99-3008787.
- Is SCIENTISTS IN SOLIDARITY INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2024.
- Are donations to SCIENTISTS IN SOLIDARITY INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SCIENTISTS IN SOLIDARITY INC file?
- Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
- When is the next return of SCIENTISTS IN SOLIDARITY INC due?
- The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did SCIENTISTS IN SOLIDARITY INC last file with the IRS?
- The latest return in the IRS public files is the 990-N for 2024 for the year ended June 30, 2025.
- Who is the principal officer of SCIENTISTS IN SOLIDARITY INC?
- The 990-N for 2024 names Arnold Castaneda.
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