CP3219

CP3219: Statutory notices of deficiency: CP3219 variants and Letter 3219

Prepared by TaxRZR editorial team · IRS sources checked 2026-10-29 (ET) · professional review pending · This page’s Source Notes

The CP3219 notice family concerns a statutory notice of deficiency, often called a 90-day letter. Check the full code: CP3219A addresses income-reporting mismatches, while CP3219N concerns an unfiled return and tax computed from available income records. Match the suffix before following response instructions.

Notice scope. This family guide preserves separate instructions for CP3219A (a filed-return mismatch), CP3219N (a missing return), and Letter 3219. Consolidating their URLs does not make their factual situations or response procedures identical. Use the exact notice and printed Tax Court petition deadline.

What the IRS can do next

The IRS generally may assess the proposed deficiency after the petition period expires if you neither agree nor timely petition the U.S. Tax Court. A timely deficiency petition ordinarily prevents assessment and collection of that disputed deficiency while the case is pending, subject to exceptions. It does not stop collection of unrelated, already assessed liabilities.

Generally petition the U.S. Tax Court within 90 days after mailing; 150 days if the notice is addressed to a person outside the United States. Locate the last day printed on the notice.

The period runs from mailing, not when you open the letter. If the last day is a Saturday, Sunday or legal holiday in the District of Columbia, the deadline moves to the next day that is not one of those days. Special relief can affect deadlines; verify your actual notice and current instructions rather than using a generic countdown. The IRS cannot extend the petition period. Sending documents, filing a missing or amended return, calling the IRS, contacting TAS or requesting reconsideration does not extend it or substitute for filing a petition with the Court.

Next step

Locate the printed petition deadline now and decide whether to petition while you discuss corrections with the IRS. If you disagree and time is short, seek qualified help without letting correspondence consume the filing period.

Steps to work through

01Read every page, identify the proposed changes and tax years, and keep the notice and envelope as evidence of mailing.
02Compare the proposal with your return, income documents and any deductions or credits supported by records. For an unfiled return, prepare the accurate return and follow the notice response instructions.
03If agreeing, read any waiver carefully before signing and follow the notice instructions. A waiver can permit assessment without waiting for the petition period.
04If disputing, send supporting records to the IRS, but independently file any petition with the U.S. Tax Court, not the IRS. Use the Court’s current electronic filing or mailing instructions and keep proof of timely filing.
05Consider a Low Income Taxpayer Clinic or qualified tax professional if you need help with the proposal or deadline.

Common misreadings

A CP2000 proposal is not the same as this statutory notice and does not itself provide this Tax Court petition window.
An IRS reply, a payment-plan call or a submitted tax return is not a Tax Court petition.
Do not sign a deficiency waiver merely to acknowledge receipt. Missing the petition deadline can lose the prepayment route to contest the deficiency; do not rely on later audit reconsideration to preserve it.

CP3219A: Statutory notice of deficiency — Tax Court rights

CP3219A is the statutory notice of deficiency for proposed income-reporting adjustments, often following a CP2000 mismatch proposal. The IRS compared your filed return with third-party records. It is not a bill; it provides the opportunity to challenge the proposed deficiency in Tax Court before paying.

What the IRS can do next: The IRS generally may assess the proposed deficiency after the petition period expires if you neither agree nor timely petition the U.S. Tax Court. A timely deficiency petition ordinarily prevents assessment and collection of that disputed deficiency while the case is pending, subject to exceptions. It does not stop collection of unrelated, already assessed liabilities.

Generally petition the U.S. Tax Court within 90 days after mailing; 150 days if the notice is addressed to a person outside the United States. Locate the last day printed on the notice.

Read every page, identify the proposed changes and tax years, and keep the notice and envelope as evidence of mailing.
Compare the proposal with your return, income documents and any deductions or credits supported by records. For an unfiled return, prepare the accurate return and follow the notice response instructions.
If agreeing, read any waiver carefully before signing and follow the notice instructions. A waiver can permit assessment without waiting for the petition period.
If disputing, send supporting records to the IRS, but independently file any petition with the U.S. Tax Court, not the IRS. Use the Court’s current electronic filing or mailing instructions and keep proof of timely filing.
Consider a Low Income Taxpayer Clinic or qualified tax professional if you need help with the proposal or deadline.

A CP2000 proposal is not the same as this statutory notice and does not itself provide this Tax Court petition window.
An IRS reply, a payment-plan call or a submitted tax return is not a Tax Court petition.
Do not sign a deficiency waiver merely to acknowledge receipt. Missing the petition deadline can lose the prepayment route to contest the deficiency; do not rely on later audit reconsideration to preserve it.

Sources: IRS: Understanding your CP3219A notice · IRS Taxpayer Advocate Service: Letter 3219, Notice of Deficiency ·

Decode CP3219A

CP3219N: Statutory notice of deficiency — Tax Court rights

CP3219N is a statutory notice of deficiency for an unfiled return: the IRS did not receive your return and calculated proposed tax, penalties and interest using reported income. File an accurate return to claim supported deductions and credits, but filing it does not extend the Tax Court petition deadline.

Generally petition the U.S. Tax Court within 90 days after mailing; 150 days if the notice is addressed to a person outside the United States. Locate the last day printed on the notice.

Read every page, identify the proposed changes and tax years, and keep the notice and envelope as evidence of mailing.
Compare the proposal with your return, income documents and any deductions or credits supported by records. For an unfiled return, prepare the accurate return and follow the notice response instructions.
If agreeing, read any waiver carefully before signing and follow the notice instructions. A waiver can permit assessment without waiting for the petition period.
If disputing, send supporting records to the IRS, but independently file any petition with the U.S. Tax Court, not the IRS. Use the Court’s current electronic filing or mailing instructions and keep proof of timely filing.
Consider a Low Income Taxpayer Clinic or qualified tax professional if you need help with the proposal or deadline.

A CP2000 proposal is not the same as this statutory notice and does not itself provide this Tax Court petition window.
An IRS reply, a payment-plan call or a submitted tax return is not a Tax Court petition.
Do not sign a deficiency waiver merely to acknowledge receipt. Missing the petition deadline can lose the prepayment route to contest the deficiency; do not rely on later audit reconsideration to preserve it.

Sources: IRS: Understanding your CP3219N notice · IRS Taxpayer Advocate Service: Letter 3219, Notice of Deficiency ·

Decode CP3219N

Letter 3219: Statutory notice of deficiency — Tax Court rights

Letter 3219 is a statutory notice of deficiency, generally following an examination of a filed return with unresolved proposed adjustments. It explains the proposed additional tax and your opportunity to challenge it in the U.S. Tax Court before payment. Review the enclosed examination report, not just the total.

Generally petition the U.S. Tax Court within 90 days after mailing; 150 days if the notice is addressed to a person outside the United States. Locate the last day printed on the notice.

Read every page, identify the proposed changes and tax years, and keep the notice and envelope as evidence of mailing.
Compare the proposal with your return, income documents and any deductions or credits supported by records. For an unfiled return, prepare the accurate return and follow the notice response instructions.
If agreeing, read any waiver carefully before signing and follow the notice instructions. A waiver can permit assessment without waiting for the petition period.
If disputing, send supporting records to the IRS, but independently file any petition with the U.S. Tax Court, not the IRS. Use the Court’s current electronic filing or mailing instructions and keep proof of timely filing.
Consider a Low Income Taxpayer Clinic or qualified tax professional if you need help with the proposal or deadline.

A CP2000 proposal is not the same as this statutory notice and does not itself provide this Tax Court petition window.
An IRS reply, a payment-plan call or a submitted tax return is not a Tax Court petition.
Do not sign a deficiency waiver merely to acknowledge receipt. Missing the petition deadline can lose the prepayment route to contest the deficiency; do not rely on later audit reconsideration to preserve it.

Sources: IRS: Understanding your CP3219A notice · IRS: Understanding your CP3219N notice · IRS Taxpayer Advocate Service: Letter 3219, Notice of Deficiency ·

Decode Letter 3219

Read in the book

Official sources

Source status. Based on our draft book dated October 29, 2026, with IRS sources checked October 29, 2026. Professional review pending. General federal tax education, not individual tax or legal advice. Your actual notice and current IRS instructions control.

Scope. These pages cover federal IRS notices, not state tax agency notices. A federal levy of a state refund is not state-specific tax guidance. The collection ladder is an illustration, not a required sequence or a promise that another warning will arrive.