IRS NOTICE REFERENCE
Understanding your letter 6167C
Letter 6167C tells you we need to verify your identity to process a federal income tax return filed with your name and taxpayer identification number.
General information only. Not legal or tax advice.
Notice details
- Notice code
- Letter 6167C
- Category
- Identity verification
- Severity tier
- Tier 2 — Action or response expected. The IRS has taken or proposed an action and expects a response or payment.
- Governing law
- §6109; §7701(a)(16) (Internal Revenue Code sections)
- Statutory response window
- 30-day window — always confirm the exact deadline against the date printed on your notice.
- Source
- IRS.gov — Understanding Your IRS Notice
What this notice is
Letter 6167C tells you we need to verify your identity to process a federal income tax return filed with your name and taxpayer identification number.
Source: IRS.gov. Reproduced for reference. General information — not legal or tax advice.
What the IRS says to do
Call the Taxpayer Assistance Center toll-free at the number on your letter. If you are out of the country, mail your response with the requested information within 30 days.
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.
Official IRS reference
Read the official notice page on IRS.gov: https://www.irs.gov/individuals/understanding-your-letter-6167c
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.
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