1. When Does an IRS Change Permit a New York Assessment?
A federal adjustment does not itself establish additional New York tax. Section 681(e) applies when a taxpayer fails to report a qualifying federal change as required by state law.
Reporting a Final Federal Change
Tax Law §659 generally requires reporting qualifying IRS changes within 90 days after final determination. Filing an amended federal return also requires a corresponding amended New York return within 90 days.
The report must accept the federal determination or explain the alleged error. New York modifications and credits may affect the resulting tax.
When a Notice of Additional Tax Due Is Authorized
Under §681(e)(1), New York may issue a Notice of Additional Tax Due when a taxpayer fails to comply with §659 or §659-a.
The notice states the additional tax and related charges and follows a different assessment procedure from an ordinary Notice of Deficiency. A state tax review can examine the state calculation.
2. What Must Be Filed within 30 Days?
Tax Law §681(e)(1) provides a specific exception to assessment on mailing. The 30-day period begins when New York mails the notice.
Required Federal-Change Report and Error Statement
Within 30 days after mailing, the taxpayer must file the required federal-change report or amended return with a statement explaining where both the federal determination and New York's Notice of Additional Tax Due are erroneous.
The filing should identify the affected tax year, disputed adjustment, and grounds for the claimed errors. A general objection does not satisfy these requirements.
Assessment and Collection Consequences
Without a qualifying filing, the deficiency and related charges stated in the notice are deemed assessed on the mailing date.
Under §681(e)(2), ordinary deficiency-notice restrictions do not prevent assessment or collection. An informal protest does not automatically suspend enforcement.
3. Can a Notice of Additional Tax Due Be Challenged?
A special assessment does not carry the ordinary appeal rights associated with a Notice of Deficiency. Available remedies depend on the notice's legal basis and the taxpayer's filing history.
Limits on Tax Appeals Hearings
Tax Law §173-a(2) generally excludes a Notice of Additional Tax Due from Article 40 hearing rights. Section 681(e)(2) also prevents the notice from supporting an ordinary deficiency petition under §689(b).
Taxpayers must identify a separate legally available basis for relief.
Correction Requests and Other Remedies
Errors may involve a previously reported federal change, an incorrect tax year, or a faulty state calculation.
Administrative correction, a refund claim, or judicial review may be available under separate statutory requirements. A tax dispute review can assess the applicable procedure.
4. Which Documents Establish the State's Calculation?
The taxpayer must connect the final federal determination to the relevant New York return and additional tax calculation.
Identifying the Final Federal Determination
An IRS examination report does not always establish finality. Under 20 NYCRR §159.5, a closing agreement, a qualifying assessment, or an IRS deficiency notice not timely challenged in Tax Court may establish a final determination.
Compare the IRS disposition, federal and New York returns, federal-change reports, and Notice of Additional Tax Due. Preserve mailing records and prior correspondence.
Reconciling Federal and New York Tax Amounts
Compare the federal adjustment with New York modifications, credits, payments, interest, and the affected tax year. The federal adjustment need not equal the additional state tax.
State assessment disputes differ from federal collection actions. An IRS bank levy review concerns federal collection rather than New York's §681(e) assessment procedure.
13 Nov, 2026
