IRS Letter 5071C: What It Means
The IRS page “Understanding your CP5071 series notice”, last reviewed March 17, 2026, says: “A federal income tax return, Form 1040 series, was filed under your Social Security number (SSN) or individual taxpayer identification number (ITIN). […]”
When we checked on November 2, 2026, the IRS page showed “Page Last Reviewed or Updated: 17-Mar-2026”. The IRS wording in quotation marks aboutLetter 5071C, part of the CP5071 series comes from that IRS page.
Maintained by Archie Chang · Reviewed November 2, 2026 · Methodology & sources
What the IRS page says the notice is about
“A federal income tax return, Form 1040 series, was filed under your Social Security number (SSN) or individual taxpayer identification number (ITIN).
We sent you a CP5071 series notice because we need you to verify your identity and the return:
If you didn’t file a return: Verify with us. You may be the victim of identity theft.
If you did file a return: Verify so we can continue processing your return.”
Response timing, as the IRS words it
When we checked on November 2, 2026, the IRS page “Understanding your CP5071 series notice” (last reviewed 17-Mar-2026) gave no response date; it says:
“Follow the instructions on your notice to verify your identity and the tax return. […]”
FedRateCalc has not seen any notice and cannot say what date one carries.
Steps the IRS page lists
“Follow the instructions on your notice to verify your identity and the tax return.
If your notice provides online verification, you can begin at: irs.gov/verifyreturn
Have your notice and tax records available when you begin the verification process.
If you filed a return - you will need:
The tax return for the tax year listed on the notice
A prior year tax return (if you filed one and have it available),
Supporting documents for each return (W-2, 1099, Schedule C, F, etc.).
If you didn’t file a return - be prepared to inform us during the verification process.
The contact information on your notice is for identity and tax return verification only. Other tax account information, such as refund status, may not be available through that contact method.”
Letters that claim to be from the IRS
The IRS page “Tax scams”, last reviewed October 17, 2026, says:
“If you get an email, text, letter or call that claims to be from the IRS — or if you see social media posts about how to get a big refund — it might be a scam or bad tax advice.”
“An email, call or message could be a scam if it:
Is unexpected
Rushes or threatens you
Offers refunds, credits or deductions
Pressures for personal or financial information
Tells you to pay now "or else"”
FedRateCalc cannot verify whether a letter is genuine. The IRS page on scams is irs.gov/help/tax-scams.
Frequently asked questions
Which notices does the IRS page say are in the CP5071 series?
The IRS page for Letter 5071C (CP5071 series), last reviewed March 17, 2026, says: “The CP5071 series notices include: CP5071 5071C CP5071F”
What does the IRS page list to have ready for CP5071 series verification?
The IRS page for Letter 5071C (CP5071 series), last reviewed March 17, 2026, says: “[…] Have your notice and tax records available when you begin the verification process. If you filed a return - you will need: The tax return for the tax year listed on the notice A prior year tax return (if you filed one and have it available), Supporting documents for each return (W-2, 1099, Schedule C, F, etc.). If you didn’t file a return - be prepared to inform us during the verification process. […]”
What does the IRS say about the contact information on a CP5071 series notice?
The IRS page for Letter 5071C (CP5071 series), last reviewed March 17, 2026, says: “[…] The contact information on your notice is for identity and tax return verification only. Other tax account information, such as refund status, may not be available through that contact method.”
Does the IRS say Form 14039 is needed after verifying a return?
The IRS page for Letter 5071C (CP5071 series), last reviewed March 17, 2026, says: “[…] If you verify your return, you don’t need to complete Form 14039, Identity Theft Affidavit, unless we tell you.”
Related FedRateCalc pages
- IRS IP PIN (the Identity Protection PIN)
- IRS tax transcript (how to get a transcript of a return)
Other IRS notice pages
Sources (checked November 2, 2026): IRS: Understanding your CP5071 series notice (page last reviewed March 17, 2026) · IRS: Tax scams