Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 45-2640216

SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS

Tax-exempt (reinstated) · CLEMSON, SC 29631

Address and contacts

Address (IRS master file)
108 DEVONSHIRE CT, CLEMSON, SC 29631-1988
In care of
% KATARZYNA BERNECKA-URBAN
Mailing address (990-N for 2025)
108 Devonshire CT, Clemson SC 29631
Principal officer (990-N for 2025)
Katarzyna Bernecka-Urban, 108 Devonshire Ct, Clemson SC 29631

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 January, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025January 31, 2026June 15, 2026990-N on file
2024January 31, 2025June 16, 2025990-N on file
2023January 31, 2024June 17, 2024990-N on file

File the 2026 990-N for SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS

Due June 15, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
45-2640216
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
2015
Accounting year ends
January
Files
Form 990-N (e-Postcard)

Revocation and reinstatement

Exemption revoked
May 15, 2014
Posted by the IRS
December 8, 2014
Reinstated
Effective August 15, 2015

From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Katarzyna Bernecka-Urban
January 31, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Katarzyna Bernecka-Urban
January 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Katarzyna Bernecka-Urban
January 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Katarzyna Berneka-Urban
January 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Katarzyna Bernecka-Urban
January 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Katarzyna Bernecka-Urban
January 31, 2020≤ $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 45-2640216).

Questions about SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS

What is the EIN of SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS?
The employer identification number (EIN) of SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS is 45-2640216.
Is SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS tax-exempt?
Yes. The IRS revoked its exemption on May 15, 2014 and reinstated it effective August 15, 2015.
Are donations to SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS due?
The return for tax year 2026 (the year ending January 31, 2027) is due June 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended January 31, 2026.
Who is the principal officer of SYMPOSIUM ON STIMULI-RESPONSIVE MATERIALS?
The 990-N for 2025 names Katarzyna Bernecka-Urban.

Other nonprofits in CLEMSON

All nonprofits in CLEMSON · South Carolina · Science and technology