IRS NOTICE REFERENCE
Understanding your CP566 notice
We need more information to process your application for an individual taxpayer identification number (ITIN) . You may have sent us an incomplete form. You may have sent us the wrong documents.
General information only. Not legal or tax advice.
Notice details
- Notice code
- CP566
- 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 need more information to process your application for an individual taxpayer identification number (ITIN) . You may have sent us an incomplete form. You may have sent us the wrong documents.
Source: IRS.gov. Reproduced for reference. General information — not legal or tax advice.
What the IRS says to do
Go over the instructions for your application. Make sure you don't qualify for a Social Security number (SSN) and you need an ITIN. Go over your application to make sure you’ve answered all the questions. Make sure your documents are correct. Send us the documents we've asked for when you reply. Make sure the documents are translated into English if we've requested a translation. Use a certified translator. Complete and sign the response form at the end of your notice. Mail it to us with any documents we've requested.
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-cp566-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)