Nonprofit · EIN 26-3299598
TENNESSEE WEED SCIENCE SOCIETY
Tax-exempt (reinstated) · KNOXVILLE, TN 37950
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-EZ | $79,950 | $84,010 | -$4,060 | $36,738 | $0 | $36,738 |
| December 31, 2024 | 990-EZ | $74,500 | $41,944 | $32,556 | $40,798 | – | $40,798 |
| December 31, 2023 | 990-EZ | $33,700 | $41,617 | -$7,917 | $8,242 | – | $8,240 |
Financial details: 990-EZ for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $79,950
Expenses
- Grants and similar amounts paid
- $84,010
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $0
- Program services (functional)
- $84,010
Balance sheet and other
- Total assets, start of year
- $40,798
- Total assets, end of year
- $36,738
- Total liabilities, end of year
- $0
- Net assets, end of year
- $36,738
- Cash, savings and investments
- $36,738
- Gross receipts
- $79,950
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990-EZ for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| TOM MUELLER | PRESIDENT | 2 | $0 |
| LARRY STECKEL | SECRETARY | 0.1 | $0 |
| BOB HAYES | DIRECTOR | 0.1 | $0 |
| CHRIS MAIN | DIRECTOR | 0.1 | $0 |
990-EZ for the year ended December 31, 2024: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| TOM MUELLER | PRESIDENT | 2 | $0 |
| LARRY STECKEL | SECRETARY | 0.1 | $0 |
| BOB HAYES | DIRECTOR | 0.1 | $0 |
| CHRIS MAIN | DIRECTOR | 0.1 | $0 |
990-EZ for the year ended December 31, 2023: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| TOM MUELLER | PRESIDENT | 2 | $0 |
| LARRY STECKEL | SECRETARY | 0.1 | $0 |
| BOB HAYES | DIRECTOR | 0.1 | $0 |
| CHRIS MAIN | DIRECTOR | 0.1 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 53141, KNOXVILLE, TN 37950-3141
- In care of
- % THOMAS MUELLER
- Mailing address (990-N for 2013)
- P O Box 53141, Knoxville TN 37950
- Principal officer (990-N for 2013)
- Thomas Mueller, PO Box 53141, Knoxville TN 37950
- Signed the 990-EZ
- THOMAS MUELLER, PRESIDENT
- Phone
- (865) 974-8805
- Website
- WWW.TNWSS.ORG
- Return prepared by
- HRB TAX GROUP INC
Mission
THE PRIMARY PURPOSE OF THE ORGANIZATION IS TO PROMOTE AND ADVANCE WEED SCIENCE ISSUES (CONTROL OF UNWANTED PLANT PESTS) IN THE STATE OF TENNESSEE.
Program accomplishments
- TO SUPPORT WEED SCIENCE EFFORTS IN THE STATE OF TENNESSEE WITH RESPECT TO RESEARCH, EXTENSION/OUTREACH, AND TEACHING FUNCTIONS. THIS INCLUDES PURCHASE OF EQUIPMENT THAT ENABLES WEED SCIENCE FACULTY AND STAFF TO CONDUCT RESEARCH MORE EFFECTIVELY AND EXAMINE THE ENVIRONMENTAL FATE OF HERBICIDES UNDER FIELD CONDITIONS AS TO FINAL PATHWAYS IN AIR, WATER, AND SOIL.Expenses $68,816 · grants $69,000
- A MAJOR INITIATIVE OF THE TNWSS IS AN EDUCATIONAL SHORT COURSE HELD PERIODICALLY, WHICH BRINGS IN NATIONALLY KNOWN SPEAKERS TO LECTURE ON WEED SCIENCE TOPICS, INCLUDING HERBICIDE MODE OF ACTION AND WEED RESISTANCE TO THOSE HERBICIDES. THE SECOND COURSE WAS HELD IN 2017 AND APPROXIMATELY 26 INDIVIDUALS ATTENDED THE COURSE. THE THIRD EVENT WAS HELD IN 2019 WITH APPROXIMATELY 27 INDIVIDUALS IN ATTENDANCE. THE 2021 EVENT WAS POSTPONED DUE TO THE COVID PANDEMIC.
- GRADUATE STUDENT TRAINING IS A CORE MISSION OF TNWSS, AND SEVERAL ACTIVITIES WERE HELD OVER THE COURSE OF THE YEAR TO HELP RECRUIT, TRAIN, AND ENHANCE THE EXPERIENCE OF WEED SCIENCE STUDENTS IN THE STATE OF TENNESSEE AND THE SOUTHERN REGION.Expenses $15,194 · grants $10,950
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. 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-EZ on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-EZ on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 26-3299598
- 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
- 2014
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Environment (C60)
- Assets (IRS master file)
- $36,738
- Income (IRS master file)
- $79,950
Revocation and reinstatement
- Exemption revoked
- May 15, 2012
- Posted by the IRS
- March 11, 2013
- Reinstated
- Effective May 15, 2012
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-EZ | December 2025 | $79,950 | $84,010 | $36,738 | XML |
| 990-EZ | December 2024 | $74,500 | $41,944 | $40,798 | XML |
| 990-EZ | December 2023 | $33,700 | $41,617 | $8,242 | XML |
| 990-EZ | December 2022 | – | – | – | IRS |
| 990-EZ | December 2021 | – | – | – | IRS |
| 990-EZ | December 2020 | – | – | – | IRS |
| 990-EZ | December 2019 | – | – | – | IRS |
| 990-EZ | December 2018 | – | – | – | IRS |
| 990-N for 2013 Officer: Thomas Mueller | December 31, 2013 | ≤ $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 26-3299598).
Questions about TENNESSEE WEED SCIENCE SOCIETY
- What is the EIN of TENNESSEE WEED SCIENCE SOCIETY?
- The employer identification number (EIN) of TENNESSEE WEED SCIENCE SOCIETY is 26-3299598.
- Is TENNESSEE WEED SCIENCE SOCIETY tax-exempt?
- Yes. The IRS revoked its exemption on May 15, 2012 and reinstated it effective May 15, 2012.
- Are donations to TENNESSEE WEED SCIENCE SOCIETY tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does TENNESSEE WEED SCIENCE SOCIETY file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of TENNESSEE WEED SCIENCE 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 TENNESSEE WEED SCIENCE SOCIETY last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
- Who is the principal officer of TENNESSEE WEED SCIENCE SOCIETY?
- The 990-N for 2013 names Thomas Mueller.
- Who are the officers and directors of TENNESSEE WEED SCIENCE SOCIETY?
- The 990-EZ for the year ended December 31, 2025 lists 4 people; 0 received compensation from the organization.
- How much revenue does TENNESSEE WEED SCIENCE SOCIETY have?
- On its 990-EZ for the year ended December 31, 2025 it reported revenue of $79,950, expenses of $84,010 and total assets of $36,738 at year end.
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