CP3219A: keep the IRS response and Court filing separate

IRS Notice CP3219A is a statutory notice of deficiency arising from the Automated Underreporter process. It proposes a tax change based on differences between return information and reports from other sources. The notice is not itself a bill or an audit. It gives you an opportunity to challenge the proposed deficiency in the U.S. Tax Court.

Start with the complete notice, its tax year and the date listed for filing a petition. You can give the IRS information to consider, but an IRS reply and a Tax Court petition are different submissions to different recipients. Keep evidence of each action and its result. Discussing the discrepancy with the IRS does not extend the time to petition the Court.

The IRS CP3219A instructions explain the current agree, disagree and reply routes. Use the instructions for the notice you actually received.

Confirm the statutory notice and its complete package

CP3219A is a later stage than an unresolved matching proposal. The CP2000 guide covers comparing the earlier proposal with payer statements and your return. A CP3219A needs its own response record even if you already sent documents or paid an amount shown on CP2000.

Current AUR procedures, section 4.19.2.4.7, describe a package containing the statutory notice, a CP2000 reprint and Form 5564, Notice of Deficiency-Waiver. Keep the explanations and response pages together rather than working from one amount or a cropped first page.

If the table is clipped, scroll sideways. Use arrow keys when focused.

The IRS says the amount on Form 5564 may differ from the prior notice because not every item can be challenged in Tax Court. Do not assume every displayed figure is a total payoff or that a difference proves the IRS lost your payment. Identify the components and records before deciding what is disputed. This guide does not decide the Court’s authority over a particular item.

For a different notice code, use the IRS notice guide. A nonfiler notice, a collection warning and CP3219A are not interchangeable.

Check petition time before waiting for an IRS answer

The general rule is 90 days after the notice of deficiency is mailed, or 150 days if the notice is addressed to a person outside the United States. That is the condition stated in Internal Revenue Code section 6213(a). It is not a general extra allowance for foreign income or a trip abroad.

The statute excludes a Saturday, Sunday or legal holiday in the District of Columbia as the last day. The Court’s guidance explains the corresponding next-business-day rule. Section 6213(a) also treats a petition filed on or before the last filing date specified by the IRS in the notice as timely. Preserve the printed date, mailing evidence and relevant circumstances for an actual review of the applicable period. Do not start a new clock from the day you opened the envelope.

The IRS can consider your explanation during the response period. A pending discussion, a request for records, a payer’s promised correction or assistance from the Taxpayer Advocate Service does not extend the petition deadline. An IRS upload confirmation is not confirmation that the Court received a petition.

There are separate statutory timing rules for particular circumstances. For example, section 6213(f) suspends the petition period during a bankruptcy prohibition on filing the petition and for 60 days afterward. It does not give every person with a bankruptcy history an automatic extra 60 days. The bankruptcy guide explains why the actual case, restriction and orders must be identified.

If the date appears to have passed, obtain prompt review of the actual notice, mailing and filing circumstances. Late filing risks dismissal. Do not assume that another IRS reply restarts the period, or that a possible timing argument guarantees the Court will hear the case. This guide does not decide notice validity, the law controlling an individual case or entitlement to relief from a missed date.

Distinguish agreement from a signed explanation of disagreement

If you agree with the proposed changes

Read the consent language and follow the current instructions for Form 5564 enclosed with your notice. The Taxpayer Advocate Service explanation of CP3219A directs taxpayers who agree to sign and return that waiver. Agreeing to assessment and choosing how to pay are separate decisions.

A waiver has a legal purpose. Section 6213(d) permits a written signed waiver of the restrictions on assessment and collection of all or part of the deficiency. Do not treat that consent as a routine document-upload signature.

Current AUR agreement procedures generally require both taxpayers on a joint return to sign the same Form 5564, with a stated exception where one spouse is deceased and the surviving spouse signs. They distinguish that from the taxpayers separately signing their individual notices. Use the actual form and applicable signature or representative-authority requirements; one person’s signature is not a general substitute for another’s.

Full payment after CP3219A, without the necessary consent signatures, is not treated as agreement with the increase under those procedures. Retain both the payment evidence and the response documents so you can establish what the IRS received and how it treated the case.

If you disagree with some or all of the changes

Identify each disputed item, the reason and the records supporting your position. The IRS directs you to provide a signed statement and says it can generally accept information by phone. Where the payer supplied incorrect information, request a corrected document or supporting statement and tell the IRS if you are waiting for it.

Keep a short issue record: the adjustment proposed, what you say is wrong, the evidence supplied and the IRS’s answer. The earlier CP2000 comparison may supply those records; you do not need to reconstruct unrelated years to answer one discrepancy.

Signing a disagreement statement is different from signing consent to the tax increase. The public IRS FAQ refers to returning Form 5564 with disagreement documents. The AUR manual separately classifies an unsigned waiver, disputing comments or disagreement with any part of the notice as a disagreed response. Follow the actual response instructions without signing consent merely because you are attaching information.

These distinctions appear in IRM 4.19.2, sections 4.19.2.4.6.6.1 and 4.19.2.4.6.6.2. They do not establish that the IRS will accept the position you submit.

An amended return is conditional

There is no blanket rule that an amended return is never accepted after CP3219A. Current IRS instructions describe a specific situation: the notice is correct and you have other income, credits or expenses to report. They say to complete Form 1040-X, write “CP3219A” at the top and submit it through a notice-reply option with Form 5564.

That is different from amending every return whenever you disagree. A similar issue in another year also needs its own correction. An amendment does not replace a Tax Court petition or extend the filing period.

Send the IRS response to the IRS

Current notice guidance describes the IRS Document Upload Tool, fax and mail. Use the applicable directions for your actual notice, including the receiving office and identifying information. Keep the complete submission, date, method and confirmation with the issue record. A phone discussion also needs a record of what was discussed and any further instruction.

If the problem involves misuse of your identity, follow the current notice and IRS identity-theft directions for that event. Use the actual enclosed response form. One identity-theft FAQ on the public page refers to Form 5546, while the main instructions and AUR procedures identify Form 5564. That inconsistency does not establish a new form requirement; clarify conflicting instructions through the IRS. It does not justify sending every identity-theft form for an ordinary payer error.

Next, record the actual IRS response: more information requested, a recomputation, agreement, no change or another action. Sending evidence is not the same as receiving a decision, and an IRS decision is not always the final event if a Court case has already been opened.

Keep a separate Tax Court filing record

If you seek Tax Court redetermination, the petition goes to the U.S. Tax Court, not the IRS. The Court’s starting-a-case guidance describes electronic filing through DAWSON and paper filing. The Court does not accept document filings by email or fax. An IRS upload, Form 12153 hearing request or collection appeal is not a substitute.

Collection Due Process concerns specified collection notices and hearing rights. It is a different procedure from petitioning to redetermine a deficiency. Do not borrow its filing periods or assume it supplies an unrestricted later opportunity to dispute the same tax.

Prepare the required documents and protect private information

Use the current Court instructions to establish the petition type, the errors disputed and the facts supporting each issue. The Court provides a DAWSON petition generator and a standard petition, Form 2. This guide does not prepare a petition or choose arguments, case procedures or litigation strategy for you.

The Court directs petitioners to include a complete copy of the notice and explanation of adjustments, with private identifiers redacted from the copy. It says not to attach a general evidence bundle of returns, receipts and other proof to the initial petition. Keep those materials securely for the appropriate later process.

The Statement of Taxpayer Identification Number, Form 4, supplies identification separately and is not part of the public case record. Do not put that identification on the petition or leave it visible on the notice copy. Current instructions also identify a Request for Place of Trial, Form 5. The electronic-filing guidance identifies a Corporate Disclosure Statement, Form 6, for a business petitioner. Follow the requirements for the actual petitioner rather than assuming every entity notice follows the individual AUR route.

A joint petition requires both petitioners’ signatures under the applicable paper or electronic instructions. Authority to represent someone before the IRS is not automatically admission to practice before the Tax Court. The Court permits self-representation and representation by a person admitted to its practice; it is not limited to attorneys alone. Anyone proceeding without a representative must still follow Court rules and orders.

Retain filing evidence, the docket number and fee decision

The Court’s electronic-filing instructions say that, in most cases, an electronic petition must be received no later than 11:59 p.m. Eastern Time on the last filing date. Do not substitute your local time zone. Creating an account or preparing a document is not filing it. Retain the actual submission information and assigned docket number. The Court says to file once, rather than filing the same petition electronically and by mail.

For a paper petition, use the current Court address and mailing instructions. The Court explains the importance of a legible eligible USPS postmark, postmarked registered or certified-mail evidence, or an eligible designated private delivery service. Not every service a private carrier offers is designated, and a private postage-meter or online postage mark alone does not prove timely mailing. Preserve the actual sending and delivery evidence. This guide does not determine timeliness from a tracking number.

The current filing fee is $60. A waiver is conditional on the Court approving an inability-to-pay application, not on the taxpayer declaring the fee waived. Tax payment is separate: in a deficiency case you usually do not have to prepay the disputed amount while the case is pending, although interest generally continues on unpaid tax. Do not confuse the filing fee, an IRS payment and a signed assessment waiver.

Identify which liability and result are affected

Section 6213(a) restricts assessment and collection of the covered deficiency during the applicable petition period and, when a timely petition has been filed, until the Court’s decision becomes final. Statutory exceptions and a written waiver matter. This is not an all-account collection shield or an automatic release of a levy for a different assessed liability.

If an IRS collection letter arrives while a deficiency case is pending, match the taxpayer, year and amount to the actual petition and raise the document through the appropriate case process. The Court’s guidance addresses that situation. Do not assume every collection document is either invalid or part of the deficiency case.

If the dispute remains unresolved and no petition is filed within the applicable period, the IRS generally assesses the proposed deficiency and sends a bill. Keep that assessment and bill separate from the earlier proposal. A payment arrangement addresses paying a balance; it does not establish that the proposed adjustment was correct.

Later reconsideration and refund procedures have their own conditions. They do not automatically restore the petition period. A missed-date case needs review of its actual procedural position rather than an assumption that payment is always required to obtain any Tax Court consideration, or that every late petition will be heard.

Confirm the IRS outcome and the Court outcome separately

Maintain two connected records for the same notice:

If the table is clipped, scroll sideways. Use arrow keys when focused.

For example, the IRS may acknowledge new payer information while a petition has not yet been submitted. Record the acknowledgment without marking the Court task complete. Conversely, a docket number confirms a court submission; it does not establish that the IRS accepted the factual explanation or that the deficiency was eliminated.

If a no-change letter arrives after you petitioned, the Court directs you to give it to the IRS attorney, paralegal or Appeals officer handling the case, with the private identifier redacted. Its guidance says that, in most instances, the IRS prepares an agreed decision for signature and submission. The Court case closes when the judge enters that decision, not merely when the IRS sends the letter.

Retain the actual closing document and check the later account treatment. The useful result is knowing which issue was resolved, by whom, and which filing, payment or court instruction still needs attention.

Sources and scope

Checked November 13, 2026 against the linked current IRS CP3219A page, AUR procedures and TAS notice guidance; selected starting, filing, privacy, fee and later-case sections of the Tax Court guidance; and sections 6213(a), (c), (d) and (f). Individual manual sections retain their own dates.

This guide concerns the individual AUR statutory-notice stage. It does not calculate a personal deadline, determine notice validity, choose litigation strategy or decide Court jurisdiction or a late-filing exception. Court instructions warn that late petitions may be untimely and dismissed. The Third Circuit’s 2023 Culp opinion remanded a particular timing issue for an individual decision; it is not a nationwide promise of relief or a reason to wait. Current law and the actual case must be reviewed where timing is disputed.