IRS NOTICE REFERENCE
Understanding your CP3219N notice
We didn't receive your tax return. We calculated your tax, penalty and interest based on wages and other income reported to us by employers, financial institutions and others. The CP3219N is a Notice of Deficiency (90-da…
General information only. Not legal or tax advice.
Notice details
- Notice code
- CP3219N
- Category
- Examination and audit
- Severity tier
- Tier 4 — Escalation warranted. The notice involves collection enforcement, appeals rights, or significant penalty exposure.
- Governing law
- §6212; §6213 (Internal Revenue Code sections)
- Statutory response window
- 90-day window — always confirm the exact deadline against the date printed on your notice.
- Escalation flag
- This notice carries a forfeitable right, a hard statutory deadline, or criminal-preparer risk. It is flagged for escalation in the TaxRiskOS workflow.
- Source
- IRS.gov — Understanding Your IRS Notice
What this notice is
We didn't receive your tax return. We calculated your tax, penalty and interest based on wages and other income reported to us by employers, financial institutions and others. The CP3219N is a Notice of Deficiency (90-day letter) . If you want to challenge our proposed tax, you have 90 days from the date shown on your notice to file a petition with the Tax Court (persons outside the country have 150 days).
Source: IRS.gov. Reproduced for reference. General information — not legal or tax advice.
What the IRS says to do
If you agree with our proposed assessment: Sign and return the response form at the end of your notice. Pay your balance in full or explore alternative payment options. If you disagree with our proposed assessment: file your tax return by the date shown on your notice. Learn more about options for filing past due returns . If you think you don’t have to file, call us at the number listed on your notice.
This is the IRS’s own guidance reproduced from the IRS notice page. It describes the IRS’s process — it is not legal or tax advice from TaxRiskOS.
Governing IRS procedure (Internal Revenue Manual)
The IRS’s own internal procedures for handling this notice type are documented in the Internal Revenue Manual:
- IRM 4.10.1 — 4.10.1 Overview of Examiner Responsibilities
- IRM 4.10.3 — 4.10.3 Examination Techniques
- IRM 4.13.1 — 4.13.1 Examination Audit Reconsideration Process
Reference to published IRS procedure. General information — not legal or tax advice.
Official IRS reference
Read the official notice page on IRS.gov: https://www.irs.gov/individuals/understanding-your-cp3219n-notice
Related tools
TaxRiskOS is workflow software for practitioners — it captures the notice, computes the deadline, surfaces the escalation tier, and builds a document checklist. It documents process; it does not give advice or draft responses.
Check this notice’s deadline (free tool)