Nonprofit · EIN 45-0448281
DAKOTA ONCOLOGY SOCIETY
Tax-exempt (reinstated) · ROCKVILLE, MD 20850
Address and contacts
- Address (IRS master file)
- 1801 RESEARCH BLVD STE 400, ROCKVILLE, MD 20850-3184
- Mailing address (990-N for 2025)
- 1801 RESEARCH BLVD 400, ROCKVILLE MD 20850
- Principal officer (990-N for 2025)
- MATTHEW TINGUELY, 820 FOURTH ST N, FARGO ND 58102
- Website
- WWW.DOS-ONCOLOGY.ORG
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 year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990-N on file |
| 2024 | December 31, 2024 | May 15, 2025 | Check at the IRS |
| 2023 | December 31, 2023 | May 15, 2024 | Check at the IRS |
IRS record
- EIN
- 45-0448281
- Tax-exempt status
- 501(c)(6): Business league or chamber of commerce
- Donations deductible
- No
- Exempt since
- 2026
- Accounting year ends
- December
- Files
- Form 990-N (e-Postcard)
- Category (NTEE)
- Health care (E03)
Revocation and reinstatement
- Exemption revoked
- May 15, 2013
- Posted by the IRS
- August 12, 2013
- Reinstated
- Effective November 15, 2025
From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-N for 2025 Officer: MATTHEW TINGUELY | December 31, 2025 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2009 Officer: Ralph Levitt | December 31, 2009 | ≤ $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 45-0448281).
Questions about DAKOTA ONCOLOGY SOCIETY
- What is the EIN of DAKOTA ONCOLOGY SOCIETY?
- The employer identification number (EIN) of DAKOTA ONCOLOGY SOCIETY is 45-0448281.
- Is DAKOTA ONCOLOGY SOCIETY tax-exempt?
- Yes. The IRS revoked its exemption on May 15, 2013 and reinstated it effective November 15, 2025.
- Are donations to DAKOTA ONCOLOGY SOCIETY tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does DAKOTA ONCOLOGY SOCIETY file?
- Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
- When is the next return of DAKOTA ONCOLOGY SOCIETY 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 DAKOTA ONCOLOGY SOCIETY 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 DAKOTA ONCOLOGY SOCIETY?
- The 990-N for 2025 names MATTHEW TINGUELY.
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