IRS NOTICE REFERENCE
Understanding your letter 4883C
We received a federal income tax return, Form 1040-series, filed under your Social Security number (SSN) or individual tax identification number (ITIN). To protect you from identity theft, we need you to verify your iden…
General information only. Not legal or tax advice.
Notice details
- Notice code
- Letter 4883C
- 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)
- Source
- IRS.gov — Understanding Your IRS Notice
What this notice is
We received a federal income tax return, Form 1040-series, filed under your Social Security number (SSN) or individual tax identification number (ITIN). To protect you from identity theft, we need you to verify your identity and the tax return so that we can continue processing it. If you didn’t file a tax return, you must let us know.
Source: IRS.gov. Reproduced for reference. 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-letter-4883c
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)