![]() |
Oh no! We may not fully support the browser or device software you are using ! To experience our site in the best way possible, please update your browser or device software, or move over to another browser. |
What is a CP566 notice?
IRS notices are letters sent to inform taxpayers of important tax information. Each one is different, but we can explain what the CP566 is about.
Understanding your CP566 notice
You applied for an Individual Taxpayer Identification Number (ITIN) and the IRS needs more information. Likely, your application is incomplete, or you sent the wrong accompanying documents.
Type of Notice
Request for information
Why you received the CP566 notice
You have received a CP566 notice because the IRS needs more information to process your ITIN application.
Likely next steps
As always, read the notice carefully and then review your application for an ITIN to ensure you answered all the questions correctly and provided the correct documentation. You will need to complete and sign the response form at the end of the CP566 notice and mail to the IRS with any accompany documents required for your application.
CP566 Notice deadline
You have 45 days from the date of the CP566 notice to reply with the appropriate information and/or documentation.
If you miss the deadline
The IRS will reject your application for ITIN and you will need to reapply.

About the Author
Mark Steber is Senior Vice President and Chief Tax Information Officer for Jackson Hewitt. With over 30 years of experience, he oversees tax service delivery, quality assurance and tax law adherence. Mark is Jackson Hewitt’s national spokesperson and liaison to the Internal Revenue Service and other government authorities. He is a Certified Public Accountant (CPA), holds registrations in Alabama and Georgia, and is an expert on consumer income taxes including electronic tax and tax data protection.

When every dollar matters, it matters who does your taxes™
-
WE SEE YOU
Our Tax Pros will connect with you one-on-one, answer all your questions, and always go the extra mile to support you.
-
WE GOT YOU
We have flexible hours, locations, and filing options that cater to every hardworking tax filer.
-
GUARANTEED
We’ve seen it all and will help you through it all. 40 years of experience and our guarantees back it up.