Nonprofit · EIN 46-2550612
CORNERSTONE MANDARIN CENTER
Tax-exempt · PALO ALTO, CA 94303
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $1,374,939 | $1,453,463 | -$78,524 | $550,771 | $0 | $550,771 |
| December 31, 2024 | 990 | $1,406,157 | $1,276,764 | $129,393 | $629,295 | $0 | $629,295 |
| December 31, 2023 | 990 | $1,087,650 | $1,098,943 | -$11,293 | $502,233 | $2,331 | $499,902 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $0
- Program service revenue
- $1,374,863
- Investment income
- $76
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $1,700
- Compensation of officers, directors and key employees
- $115,000
- Other salaries and wages
- $856,146
- Salaries, compensation and benefits (total)
- $1,116,788
- Professional fundraising fees
- $0
- Accounting fees
- $6,760
- Occupancy
- $159,812
- Travel
- $36,270
- Depreciation
- $128
- Program services (functional)
- $1,453,463
Balance sheet and other
- Total assets, start of year
- $629,295
- Total assets, end of year
- $550,771
- Total liabilities, end of year
- $0
- Net assets, end of year
- $550,771
- Land, buildings and equipment
- $193
- Gross receipts
- $1,374,939
- Employees
- 21
- Volunteers
- 17
- Year formed
- 2013
- State of legal domicile
- CA
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 for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| HELEN WONG | PRESIDENT Trustee or director, Officer, Key employee, Highest-paid employee | 80 | $115,000 |
990 for the year ended December 31, 2024: 1 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| HELEN WONG | PRESIDENT Trustee or director, Officer, Key employee, Highest-paid employee | 80 | $116,750 |
990 for the year ended December 31, 2023: 1 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| HELEN WONG | PRESIDENT Trustee or director, Officer, Key employee, Highest-paid employee | 80 | $115,000 |
Address and contacts
- Address (IRS master file)
- 1985 LOUIS RD, PALO ALTO, CA 94303-3450
- In care of
- % HELEN WONG
- Mailing address (990-N for 2019)
- 6705 TRINIDAD DR, SAN JOSE CA 95120
- Principal officer (990 for 2025)
- HELEN WONG, 6705 TRINDAD DR, SAN JOSE, CA 95120
- Principal officer (990-N for 2019)
- HELEN WONG, 6705 TRINIDAD DR, SAN JOSE CA 95120
- Signed the 990
- HELEN WONG, DIRECTOR
- Phone
- (650) 649-9666
- Return prepared by
- WONG'S TAX AND BUSINESS SERVICES CORPORATION
California records
California keeps its own records of charities and corporations. Search them by EIN 46-2550612 or by the name CORNERSTONE MANDARIN CENTER.
- Attorney General, Registry of Charities and Fundraisers
- Registration status and filed reports (CT-TR-1, RRF-1)
- Secretary of State, bizfile Online
- Corporation status, entity number, agent for service
- Franchise Tax Board
- Entity status letter (state tax exemption, good standing)
Mission
OFFER A MANDARIN ENRICHMENT PROGRAM FOR LOCAL PREK-8TH GRADE STUDENTS
Program accomplishments
- OFFER A MANDARIN ENRICHMENT PROGRAM FOR LOCAL PREK-8TH GRADE STUDENTSExpenses $1,453,463 · revenue $1,374,939
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 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 46-2550612
- 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
- 2014
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Arts, culture and humanities (A99)
- Assets (IRS master file)
- $550,771
- Income (IRS master file)
- $1,374,939
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $1,374,939 | $1,453,463 | $550,771 | XML |
| 990 | December 2024 | $1,406,157 | $1,276,764 | $629,295 | IRS |
| 990 | December 2023 | $1,087,650 | $1,098,943 | $502,233 | XML |
| 990 | December 2022 | $854,212 | $1,015,777 | $511,194 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990-N for 2019 Officer: HELEN WONG | December 31, 2019 | ≤ $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 46-2550612).
Questions about CORNERSTONE MANDARIN CENTER
- What is the EIN of CORNERSTONE MANDARIN CENTER?
- The employer identification number (EIN) of CORNERSTONE MANDARIN CENTER is 46-2550612.
- Is CORNERSTONE MANDARIN CENTER tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2014.
- Are donations to CORNERSTONE MANDARIN CENTER tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does CORNERSTONE MANDARIN CENTER 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 CORNERSTONE MANDARIN CENTER 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 CORNERSTONE MANDARIN CENTER last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of CORNERSTONE MANDARIN CENTER?
- The 990 for the year ended December 31, 2025 names HELEN WONG.
- Who are the officers and directors of CORNERSTONE MANDARIN CENTER?
- The 990 for the year ended December 31, 2025 lists 1 person; 1 received compensation from the organization, the highest $115,000 (HELEN WONG, PRESIDENT).
- How much revenue does CORNERSTONE MANDARIN CENTER have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $1,374,939, expenses of $1,453,463 and total assets of $550,771 at year end.
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