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IRS · Proposed Change

CP3219AStatutory Notice of Deficiency

The IRS proposes a tax adjustment and explains how to challenge it in U.S. Tax Court.

Reviewed October 10, 2026 • Free Action Plan
Go to Your Next Steps
Know Your Response WindowTax Court Petition: Usually 90 Days From Mailing

A deficiency petition generally must be filed by the 90th day after the notice is mailed, or the 150th day if addressed to a person outside the United States. Use the last date stated on the notice and obtain advice if any date or exception is unclear. Online petitions generally must reach DAWSON by 11:59 p.m. Eastern Time on the last filing date. IRS discussions do not extend this deadline.

Verify with the Agency
Make an Informed Choice

What You Can Handle.
When to Bring in Help.

DIY May Be Appropriate If…

  • You understand the proposed adjustment and consequences of agreeing.
  • You can identify the exact petition deadline and follow court filing rules if challenging it.
  • You will not wait for IRS correspondence past the court deadline.

Get Professional Help If…

  • You disagree with the proposed assessment.
  • The deadline is near or may already have passed.
  • The notice went to an old or foreign address, or the mailing date is disputed.
  • You need legal analysis, cannot interpret the waiver, or suspect identity theft.

You can contact the agency yourself. These conditions help you judge complexity; they do not determine eligibility or guarantee a result.

Put the Information to Work

Your Step-by-Step Plan

Choose the situation that matches your records. The steps help you prepare and respond; the agency decides your case.

0 of 5 steps checked

  1. Protect the Petition Date Before Anything Else

    Locate the notice’s mailing date and last date to petition. Save the envelope. Calendar the date and the applicable electronic filing cutoff. Do not calculate from the day you read the letter or from a previous CP2000.

    U.S. Tax Court: Starting a Case

  2. Compare the Proposed Tax with the Evidence

    Review the notice calculation, earlier CP2000, filed return, and payer records. Identify what you agree with and each specific error. Request a corrected statement from a payer if necessary, but do not let that request consume the petition period.

    IRS: Understanding Your CP3219A Notice

  3. Choose Agreement or Challenge Deliberately

    If agreeing, follow the Form 5564 instructions. If disputing, send a signed explanation and evidence to the IRS promptly and evaluate whether a timely Tax Court petition is needed to preserve review. Do not sign a waiver merely to acknowledge receipt.

    IRS: Understanding Your CP3219A Notice

  4. Use the Correct Recipient

    A petition is filed with the U.S. Tax Court, not sent as an IRS notice response. Follow the Court’s instructions for DAWSON or paper filing, required documents, privacy redactions, signatures, and any fee or waiver request. Keep proof of filing.

    U.S. Tax Court: Starting a Case

  5. Track Both the IRS and Court Communications

    If you petition, comply with subsequent court orders and deadlines. If the IRS proposes a resolution, review it before signing. If you agree with a balance but need time to pay, separately discuss payment options with the IRS.

    IRS: Understanding Your CP3219A NoticeIRS: Payment Plans and Installment Agreements

Checkmarks are for your use on this page. They are not sent to an agency or stored as a case record.

Go to the Right Place

Who to Contact

IRS Office Listed on Your Notice

Use the telephone number and correspondence address on the verified notice. Have the notice, tax year, return, and payment records ready. The official explanation below confirms the intended response route.

Official Contact Route

IRS Online Account

Review available balance and payment information. An account inquiry is not a formal appeal or a substitute for a required written response.

Official Contact Route

U.S. Tax Court

Use the Court’s Starting a Case instructions for petition filing. The IRS upload tool is not the court filing system.

Official Contact Route

Low Income Taxpayer Clinics

Ask a clinic whether it can assist with your dispute and deadline. Acceptance is not automatic.

Official Contact Route

Use the correct contact for your notice. Keep copies, reference numbers, and notes of any conversation.

Prepare Before You Respond

Records & Forms

  • Every page of the notice and its envelope.
  • The filed return for each period listed.
  • Payment confirmations, cancelled checks, or bank transaction records.
  • Earlier notices, submitted responses, and agency confirmations.
  • The deficiency notice and envelope showing mailing information.
  • The prior CP2000, response history, and evidence for each contested item.
Form 5564, Notice of Deficiency Waiver

For an agreement after reviewing the proposed adjustment; do not treat it as a routine receipt.

Tax Court Petition and Required Documents

Use the Court’s current filing instructions and privacy requirements.

Form 2848

May authorize IRS representation; it does not admit a representative to Tax Court.

Keep these records in your own secure files. The Liberty Standard inquiry form is for general information only.

Match the Expertise to the Work

Which Professional Could Help?

Tax AttorneyTax Court-Admitted PractitionerEnrolled AgentCPA

Administrative IRS authority and Tax Court admission are different. Use a court-admitted representative for litigation and legal counsel for legal advice.

Compare Roles & Verify Qualifications
Support by Choice

Choose How to Find Help.

Exploring help with CP3219A? Include that notice in your inquiry without sending the document itself.

Liberty Standard Resources

Find the Right Support.

Tell us what you need and the kind of professional you are looking for. Our network is in development. Any proposed introduction requires review of availability, credentials, and the work involved.

Request a Professional Connection

Your request does not arrange an introduction or engage a professional. Any proposed scope, fees, and terms must be explained before you decide.

Close the Loop

Know What Happens Next.

  • A documented agreement resolves the proposed adjustment.
  • A timely petition places the dispute before the Tax Court.
  • The IRS assesses the proposed change if the matter is not resolved and no timely petition is filed.
  • A missed deadline requires immediate legal review of any remaining options.

Sending a request does not mean the issue is resolved. Verify receipt, keep the response date visible, and follow the agency’s written determination.

The Source Behind the Steps

Official Sources

IRS: Understanding Your CP3219A Noticewww.irs.govU.S. Tax Court: Starting a Caseustaxcourt.govIRS: Tax Records and Transcriptswww.irs.govIRS: Payment Plans and Installment Agreementswww.irs.govIRS: Low Income Taxpayer Clinicswww.irs.govIRS: Form 2848, Power of Attorneywww.irs.govIRS: Tax Return Preparer Credentials and Qualificationswww.irs.gov

General education, not a professional engagement or an individualized tax or legal determination. Use the current agency instructions and the deadlines on your actual notice.

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