1. Identify the Agency and Tax Period First
The issuing authority determines which tax system applies. Identify the agency and tax period before selecting records or a review procedure.
Separate Federal, State, and City Tax Matters
An IRS notice concerns federal tax administration. A New York State Department of Taxation and Finance notice may involve personal income, sales and use, corporate, withholding, or another state-administered tax. Certain city business taxes are administered by the NYC Department of Finance. Read the document for the tax type, period, amount, notice number, and agency action. A broader disagreement over an assessment may overlap with tax disputes.
Match Each Notice to the Correct Return
Compare each notice with the corresponding return, payments, and earlier agency correspondence. For an IRS matter, the notice or letter number can help distinguish a request for information from a proposed adjustment, deficiency, or collection notice.
2. Separate Filing Errors, Audits, and Collection Matters
A return error, examination, assessment, and collection action occur at different procedural stages. The stage determines whether the immediate task is correcting information, producing records, challenging an adjustment, or addressing an existing liability.
A Filing Error Does Not Always Mean an Audit
A taxpayer may discover omitted income, an incorrect deduction, or another reporting error before an examination begins. A taxing authority may also identify a mathematical or reporting discrepancy without opening a broader audit. An amended return can correct reported information, but it does not automatically replace a required response or extend an existing protest or court deadline.
An Audit Tests a Reported Tax Position
During an examination, the agency may request documents supporting income, deductions, credits, expenses, basis, or another item reported on a return. Organize records around the item being examined. If the IRS proposes changes, review both the adjustment and the administrative rights stated in the correspondence. Related issues may also fall within IRS audit defense.
Collection Concerns an Existing Liability
Collection generally follows an assessment. Review the tax period, balance, penalties, interest, prior payments, and collection action described in the notice. A levy-related notice presents different questions from a proposed audit adjustment. More specific levy issues may overlap with IRS tax levy.
3. Match the Deadline to the Review Procedure
There is no universal response period for tax notices. The agency, tax, document, and procedural stage determine the filing deadline.
IRS Appeals and Tax Court Follow Different Routes
IRS Letter 525 generally provides 30 days from the letter date to request review by the IRS Independent Office of Appeals. The protest or appeal request is generally submitted to the IRS office identified in the letter. A statutory Notice of Deficiency follows a different procedure. A taxpayer generally has 90 days from the notice date to petition the U.S. Tax Court, or 150 days when the notice is addressed outside the United States. Continuing discussions with the IRS should not be assumed to extend the Tax Court deadline.
New York State Has Its Own Protest System
When a New York State Tax Department notice provides protest rights, a taxpayer may be able to request a conciliation conference through the Bureau of Conciliation and Mediation Services or petition the Division of Tax Appeals. A personal income tax Notice of Deficiency and a sales and use tax Notice of Determination generally provide 90 days to challenge the determination, or 150 days when addressed outside the United States. The particular notice still controls. When available, Form CMS-1 may be used for a conciliation request and Form TA-100 for a Division of Tax Appeals petition. Related issues may also fall within state tax.
Certain City Taxes Follow a Separate Review Route
For taxes administered by the NYC Department of Finance, a formal Notice of Determination generally may be challenged through a conciliation conference or a petition to the NYC Tax Appeals Tribunal. A Notice of Determination generally carries a 90-day period, or 150 days when addressed outside the United States. Taxes administered by New York State and real property assessment disputes may follow different procedures.
4. Build the File Around the Disputed Issue
Start with the notice and return, then add records directly connected to the adjustment or collection issue.
Match Records to Each Disputed Item
Relevant documents may include W-2s, 1099s, bank statements, invoices, payroll records, receipts, contracts, accounting ledgers, basis records, amended returns, payment confirmations, and agency correspondence. For a business, reconcile the return with the accounting records behind the disputed item. If several adjustments appear on one notice, organize supporting records separately.
Preserve the Filing Timeline
Keep the complete notice, attachments, responses, submission confirmations, payment records, and later correspondence. When dates matter, retain available mailing records or electronic submission confirmations. A short chronology can help identify when an inquiry became an adjustment, assessment, collection matter, or formal appeal.
5. Frequently Asked Questions
Can IRS Penalties Be Reduced or Removed?
Sometimes. Penalty treatment depends on the particular penalty, return, tax period, and taxpayer's compliance history. Beginning in 2026, the IRS introduced Automatic Exemption from Penalty for qualifying original returns. AEP can prevent certain failure-to-file, failure-to-pay, and failure-to-deposit penalties when eligibility requirements are met. First Time Abate remains relevant to certain periods during the transition, and reasonable-cause relief may also be available depending on the facts.
Can a Taxpayer Use a Payment Plan Instead of Paying in Full?
Potentially. A taxpayer who cannot immediately pay an accepted federal tax liability may qualify for an IRS short-term payment plan or installment agreement. A payment plan addresses collection of an existing liability. It does not determine whether the assessment is correct or replace a protest or Tax Court deadline. Interest and applicable penalties generally continue while a balance remains unpaid.
6. When Should a Tax Notice Be Reviewed by an Attorney?
Attorney review may be useful when several tax years or agencies are involved, an examination becomes a formal dispute, collection activity begins, or a notice starts an administrative or court filing period. A tax attorney can review the notice, relevant returns, agency correspondence, and deadline to assess whether a response, protest, collection option, or court filing remains available.
27 Oct, 2026
