What is the IRS phone number to find my ITIN?

Call 1-800-829-1040. Phone lines are open Monday through Friday, 7 AM to 7 PM local time. When prompted, select the option for individual tax questions. Have your full legal name, date of birth, and mailing address on file with the IRS ready. The agent will verify your identity before providing your ITIN. Average hold time is 15 to 45 minutes depending on the time of year.

What does a CP565 ITIN letter look like?

The CP565 is a single-page letter from the IRS on official Department of the Treasury letterhead. It contains your assigned 9-digit ITIN number (format 9XX-XX-XXXX), your name, the date your ITIN was assigned, and instructions for using it. The letter arrives in a standard white IRS envelope. If you received your ITIN, you received a CP565 notice by mail to the address on your W-7 form.

Can I find my ITIN on my old tax return?

Yes. Your ITIN appears on every federal tax return you filed using it. Check the SSN/ITIN field on Form 1040, 1040-NR, or 1040-SR. It also appears on any W-2 or 1099 forms issued to you. If you used a tax preparer, they have your ITIN on file. If you filed through an online tax service, log into your account to view past returns.

How long does it take to get my ITIN by calling the IRS?

The phone call itself takes 15 to 45 minutes including hold time. The IRS agent provides your ITIN verbally during the call. There is no additional waiting period. You will need to verify your identity by answering security questions about your name, date of birth, address, and previous tax filings. If you cannot verify your identity by phone, the agent will direct you to visit a TAC office in person.

Can my tax preparer look up my ITIN?

Yes. If a tax preparer previously filed a return using your ITIN, they have it on record. Contact the preparer or firm that assisted you. They can provide your ITIN after verifying your identity. If you used an online tax filing service like TurboTax or H&R Block, your ITIN is stored in your account under prior year returns. Call their customer service line for help accessing it.

What if I never received my CP565 letter?

If you applied for an ITIN and never received a CP565 letter, call the IRS at 1-800-829-1040 to check your application status. If the ITIN was assigned but the letter was lost in transit, the IRS can resend it. Allow 30 days for delivery. If the application is still pending after 11 weeks, ask the agent for a status update. If it was rejected, you received or will receive a CP567 rejection notice.

Can I visit an IRS office to find my ITIN?

Yes. Visit a Taxpayer Assistance Center (TAC) with valid government-issued photo identification. The IRS has 358 TAC offices across the US. You must schedule an appointment by calling 1-844-545-5640. Walk-ins are not accepted. Bring your passport or other photo ID, and the agent will look up your ITIN after verifying your identity in person. This is the fastest method if you are near a TAC.

Is my ITIN the same as my SSN?

No. An ITIN and SSN are different numbers issued by different agencies. ITINs start with the digit 9 and have specific middle digit ranges (50-65, 70-88, 90-92, 94-99). SSNs never start with 9. Both are 9 digits in XXX-XX-XXXX format. An ITIN is for tax filing only and does not authorize work. See our ITIN vs SSN comparison for all differences.

What should I do after I find my ITIN?

Store your ITIN securely. Write it down and keep it with important documents. Take a photo of your CP565 letter and store it in a secure cloud location. You will need your ITIN for annual tax filing, opening bank accounts, applying for credit, and any financial transactions requiring a taxpayer ID. Check if your ITIN needs renewal: ITINs not used on a tax return for 3 consecutive years expire automatically.

How to Find Your ITIN Number: 3 Methods

Updated April 2026

Direct answer: Find your ITIN 3 ways: (1) check your CP565 assignment letter from the IRS, (2) call the IRS at 1-800-829-1040 and verify your identity, or (3) visit a Taxpayer Assistance Center with photo ID. Your ITIN also appears on previous tax returns and W-2/1099 forms.

Method 1: How Do You Find Your ITIN on Your CP565 Letter?

The CP565 notice is the original ITIN assignment letter the IRS mailed to you when your ITIN was approved. Your 9-digit ITIN appears in the top right section of the letter in the format 9XX-XX-XXXX. The letter also shows your full legal name and the date your ITIN was assigned. Check your files, tax document folders, or safety deposit box. Many people store this letter with their passport and immigration documents. If you used a tax preparer or Certifying Acceptance Agent, they may have a copy on file. If you cannot locate the letter, see our guide on replacing your lost ITIN letter.

Method 2: How Do You Find Your ITIN by Calling the IRS?

Call the IRS individual taxpayer line at 1-800-829-1040. Hours are Monday through Friday, 7 AM to 7 PM local time. When the automated system answers, select the option for individual tax questions. Wait for a live agent. Provide your full legal name, date of birth, and the mailing address currently on file with the IRS. The agent will ask security questions to verify your identity. Once verified, the agent provides your ITIN verbally. Write it down immediately. Average hold time is 15 to 45 minutes. Call early morning (7 to 8 AM) or late afternoon (5 to 7 PM) for shorter wait times. Avoid calling during January through April (tax season) when hold times exceed 60 minutes.

Method 3: How Do You Find Your ITIN at an IRS Office?

Visit an IRS Taxpayer Assistance Center (TAC) in person. The IRS operates 358 TAC offices across the United States. You must schedule an appointment in advance by calling 1-844-545-5640. Walk-ins are not accepted at most locations. Bring a valid government-issued photo ID such as a passport, national ID card, or state driver's license. The TAC agent verifies your identity in person and looks up your ITIN in the IRS system. This is the fastest method if you live near a TAC office because you get the answer during your appointment with no waiting for callbacks or mail.

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Where Else Can You Find Your ITIN Number?

Your ITIN appears on several documents beyond the CP565 letter. Check your previous federal tax returns (Form 1040, 1040-NR, or 1040-SR) in the SSN/ITIN field. It appears on any W-2 forms from employers who used your ITIN. It appears on 1099 forms from banks, brokerages, or other payers. If you used a tax preparation service, your ITIN is in their records. Contact H&R Block, TurboTax, or whatever service you used. Your ITIN may also appear on bank account opening documents, mortgage applications, or other financial records where you provided it.

How Do You Verify Your ITIN Is Still Active?

ITINs expire if not used on a federal tax return for 3 consecutive tax years. When you find your ITIN, verify it is still active by calling the IRS at 1-800-829-1040. The agent can confirm whether your ITIN is active or expired. If expired, you must renew your ITIN before using it on a tax return. The renewal process uses the same Form W-7 but with different instructions. If your ITIN has specific middle digits that were part of the IRS rotation schedule, it may have been deactivated regardless of usage. See our ITIN expiration guide for the complete middle digit schedule.

What Should You Do If You Cannot Find Your ITIN Anywhere?

If you cannot locate your ITIN through any method, the IRS can reissue your CP565 letter. Call 1-800-829-1040, verify your identity, and request a replacement notice. The replacement letter arrives by mail within 30 days. You do not need to file a new W-7 or apply for a new ITIN. Your original ITIN number remains the same for life. It is never changed or replaced with a different number. If you are unsure whether you were ever assigned an ITIN, the IRS agent can check their records during the phone call or TAC visit. See our ITIN number lookup guide for more details.

How Do You Keep Your ITIN Safe After Finding It?

Once you have your ITIN, protect it like any sensitive identification number. Store your CP565 letter in a fireproof safe or safety deposit box. Take a clear photo and save it in an encrypted cloud storage location. Write the number in a secure password manager. Do not carry the CP565 letter in your wallet or share your ITIN by email. The IRS never asks for your ITIN by email. Only provide your ITIN to verified financial institutions, employers, and tax preparers. Identity theft using ITINs is rare but increasing. Report suspected misuse to the IRS Identity Protection Unit at 1-800-908-4490.

Government Sources

IRS ITIN inquiry procedures per IRS Publication 1915. Taxpayer Assistance Center locations from irs.gov/help/tac-locations. IRS phone line hours from irs.gov/help/telephone-assistance. CP565 notice format per IRS notice guidelines. Information current as of April 2026.

Finding Your ITIN: Frequently Asked Questions

No. The IRS does not provide ITIN numbers through any online portal or website. There is no online ITIN lookup tool. You must use one of 3 methods: check your original CP565 assignment letter, call the IRS at 1-800-829-1040, or visit a Taxpayer Assistance Center in person with valid photo identification. Third-party websites claiming to look up ITINs online are not legitimate.

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