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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 85-3827282

HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP

Tax-exempt · LOS ALTOS, CA 94022

Address and contacts

Address (IRS master file)
221 MAIN ST, LOS ALTOS, CA 94022-2937
Mailing address (990-N for 2025)
221 Main Street PO Box 2013, Los Altos CA 94022
Principal officer (990-N for 2025)
Sheldon Finkelstein, 27664 Vogue Court, Los Altos Hills CA 94022

California records

California keeps its own records of charities and corporations. Search them by EIN 85-3827282 or by the name HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP.

Attorney General, Registry of Charities and Fundraisers
Registration status and filed reports (CT-TR-1, RRF-1)

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 yearYear endedDueIRS public records
2025June 30, 2026November 16, 2026990-N on file
2024June 30, 2025November 17, 2025990-N on file
2023June 30, 2024November 15, 2024990-N on file

File the 2026 990-N for HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP

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

IRS record

EIN
85-3827282
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
2022
Accounting year ends
June
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Sheldon Finkelstein
June 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Sheldon Finkelstein
June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Sheldon Finkelstein
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 85-3827282).

Questions about HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP

What is the EIN of HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP?
The employer identification number (EIN) of HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP is 85-3827282.
Is HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2022.
Are donations to HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP due?
The return for tax year 2026 (the year ending June 30, 2027) is due November 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended June 30, 2026.
Who is the principal officer of HIGH PERFORMANCE TRANSACTION SYSTEMS WORKSHOP?
The 990-N for 2025 names Sheldon Finkelstein.

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