IRS NOTICE REFERENCE
Understanding your CP561A notice
We have important information about your child's Adoption Taxpayer Identification Number (ATIN). Your child's ATIN expires in 3 months.
General information only. Not legal or tax advice.
Notice details
- Notice code
- CP561A
- 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 have important information about your child's Adoption Taxpayer Identification Number (ATIN). Your child's ATIN expires in 3 months.
Source: IRS.gov. Reproduced for reference. General information — not legal or tax advice.
What the IRS says to do
Complete Form 15100, Adoption Taxpayer Identification Number (ATIN) PDF Extension Request, included with your notice if you received a Social Security number (SSN) for your child, or; Complete Form 15100, Adoption Taxpayer Identification Number (ATIN) PDF Extension Request, included with your notice if you received a Social Security number (SSN) for your child, or; Apply for a one-year extension of this ATIN by completing Form 15100, if you don't have an SSN. You can send us your information using the Document Upload Tool. To use the tool, visit IRS.gov/dutreply , or: If you prefer, fax your information to the fax number in the notice using either a fax machine or an online fax service. Protect yourself when sending digital data by understanding the fax service’s privacy and security policies.
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-cp561a-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.
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