1. The Issuing Agency Determines the Correct Tax Procedure
Check the sender, tax period, amount, and deadline. Each agency uses a separate process. Sending records to the wrong agency does not stop the deadline.
Federal Tax Notices Follow IRS Procedures
The IRS administers federal income, employment, and other federal taxes under the Internal Revenue Code. Living or operating a business in NYC does not create a separate federal tax procedure; the notice and underlying liability determine the next step.
State and Municipal Taxes Require Separate Responses
The New York State Department of Taxation and Finance administers state taxes. The New York City Department of Finance handles certain municipal taxes, including business taxes. State and city tax disputes follow different appeals procedures. Businesses should assess their state and local tax obligations independently of any IRS matter.
Federal Adjustments May Trigger State Reporting Duties
IRS adjustments can also affect state reporting. Under New York Tax Law § 659, taxpayers covered by the provision generally must report qualifying final federal changes within 90 days of final determination. Amended federal returns and certain partnership adjustments may follow separate rules. Resolving the IRS matter may not complete state compliance.
2. The Notice Type Determines the Required Response
Not every IRS letter announces an audit or a tax debt. Some seek records, others propose adjustments, and collection notices address unpaid balances. The notice identifies the required response and deadline.
CP2000 Notices Propose Income Adjustments
A CP2000 identifies a mismatch between a filed return and information reported by third parties. It proposes a change but is not an audit notice or bill. Compare the amounts against Forms W-2, 1099, and the return, then provide an explanation and records if you disagree. The IRS generally requests a response within 30 days, or 60 days for taxpayers living abroad; follow the printed deadline.
Examination Letters Request Specific Evidence
An examination letter identifies the return items under review and the requested evidence. The IRS may conduct the examination by correspondence or in person. Submit relevant receipts, expense records, or other supporting materials using the method and date stated. An examination may close without changes or produce proposed adjustments.
Collection Notices Address Unpaid Balances
Collection notices concern unpaid tax liabilities. IRS Letter 1058, for example, is a final notice of intent to levy that explains Collection Due Process hearing rights. A hearing request generally must be filed within 30 days of the letter's date. Missing that window can affect judicial review. See the separate discussion of IRS tax levy procedures for collection-specific issues.
3. Supporting Records Should Address the Disputed Items
Organize supporting documents by tax year and disputed issue. A focused response should connect each claimed amount to records and explain what those records prove.
Individuals Should Reconcile Income and Deductions
Compare the notice with the filed return and related information statements. Depending on the dispute, useful records include Forms W-2 or 1099, corrected statements, bank records, and receipts supporting deductions or credits. If a third party made an error, seek a correction. Records must support the claimed tax treatment.
Business Records Should Explain Transactions
Reconcile ledgers, invoices, payroll records, and bank statements with the filed return. A bank deposit may be revenue, loan proceeds, or a transfer between accounts; the underlying records establish its treatment. Preserve records showing the funds’ source and purpose. Broader examination questions belong in the separate IRS audit defense resource.
Submission Instructions Depend on the Notice
Keep original records and copies of everything submitted. The IRS may accept documents by approved upload, fax, or mail. Use the stated destination and retain proof of delivery. Submitting documents does not itself extend a deadline; request additional time through the procedure identified in the notice.
4. Tax Appeals Depend on the Agency and Notice
Disagreement alone does not initiate an appeal. An administrative protest, collection hearing request, and court petition have different rules and deadlines. The issuing agency and exact notice determine which route is available.
IRS Administrative Appeals Require a Proper Protest
The IRS Independent Office of Appeals considers many disputed examination and collection decisions. Taxpayers generally submit a written protest or eligible small-case request to the IRS office named in the letter, not directly to Appeals. Explain the disputed findings, supporting facts, and legal grounds, and follow the stated deadline. Those unable to pay an agreed debt may consider tax debt relief options; payment plans may still accrue interest and penalties.
A Notice of Deficiency Creates Tax Court Rights
A statutory Notice of Deficiency may permit a challenge before paying the proposed federal deficiency. Under 26 U.S.C. § 6213(a), a Tax Court petition generally must be filed within 90 days after mailing, or 150 days if the notice is addressed outside the United States. Weekend and holiday rules apply. A CP2000 response is not a substitute for a timely petition. Tax Court petitions may be filed through DAWSON.
State Tax Disputes Have Independent Deadlines
For many state notices of deficiency or determination, a taxpayer generally has 90 days to request a conciliation conference or petition the Division of Tax Appeals. Other notices, including some refund or penalty decisions, have different rules. Check the applicable notice and statute. Auditor discussions do not automatically extend the deadline.
Municipal Business Tax Appeals Follow Separate Rules
For many city business tax Notices of Determination, the deadline to request conciliation or petition the New York City Tax Appeals Tribunal is 90 days, or 150 days when addressed outside the United States. Certain refund disallowances have different periods. The Tribunal has separate filing and service rules. A city protest does not challenge an IRS liability, and an IRS appeal does not preserve a city filing deadline.
Start with the notice, not assumptions about the dispute. Verify the agency, tax period, records requested, and deadline before choosing a response or appeal.
20 Oct, 2026
