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How to know my itin number?

Find your ITIN number by checking IRS notices, tax returns, or contacting the IRS directly. If you never received one, you'll need to apply.

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    If you have previously filed a U.S. federal tax return and were issued an Individual Taxpayer Identification Number (ITIN), you can find it on IRS notices, previous tax returns, or by contacting the IRS directly. If you have never been issued an ITIN and need one, you must apply for it using Form W-7, Application for IRS Individual Taxpayer Identification Number. Understanding how to know my ITIN number is a common concern for non-residents and foreign nationals interacting with the U.S. tax system.

    Retrieving a Previously Issued ITIN

    If you have an ITIN and need to locate it, several methods are available. The most straightforward way is to check your past tax filings. The IRS typically includes your ITIN on all correspondence sent to you, as well as on the tax returns you submit.

    Check Your Tax Returns

    Your ITIN will appear on any federal tax return you have filed. This includes Form 1040-NR, U.S. Nonresident Alien Income Tax Return, if you are required to file one. Look for the field designated for your Social Security Number (SSN) or ITIN. If you have a copy of a previously filed return, your ITIN should be clearly visible.

    Review IRS Notices

    The IRS sends various notices to taxpayers. If an ITIN was assigned to you, it will be present on correspondence such as penalty notices, refund notices, or other official communications. If you have received any letters or notices from the IRS regarding your tax obligations, check them carefully for your ITIN. Common IRS notices that might contain your ITIN include those related to adjustments, assessments, or account status updates. Specifically, notices like CP-565 (Notice of ITIN Assignment) are directly related to your ITIN.

    Contact the IRS Directly

    If you cannot locate your ITIN through your own records, you can contact the IRS directly. Be prepared to verify your identity. The IRS will ask for information to confirm you are the person to whom the ITIN was issued. This may include your full name, address, previous addresses, and details from a prior tax return. You can call the IRS toll-free at 1-800-829-1040 (for those calling from within the U.S.) or 267-941-1000 (toll call from outside the U.S.). International callers may also use the IRS international taxpayer service line. The IRS will not provide your ITIN over the phone if they cannot adequately verify your identity. They may, however, provide instructions on how to obtain it, which could involve mailing in documentation or applying again if necessary.

    IRS ITIN Unit

    For specific inquiries about ITINs, you can write to the IRS ITIN Operation. The address is: Internal Revenue Service, ITIN Operation, P.O. Box 149124, Austin, TX 78714-9124. When writing, include your full name, current address, and any previous addresses and names used. It is advisable to include a copy of a valid identification document, such as a passport, if you are requesting information about your ITIN. Be aware that correspondence with the IRS can take several weeks.

    Applying for a New ITIN

    If you have never been issued an ITIN and require one for U.S. tax purposes, you must apply for it. This is a common situation for individuals who do not qualify for an SSN but have U.S. tax obligations or are dependents on a U.S. tax return. The application process is managed by the IRS and involves submitting Form W-7.

    Eligibility for an ITIN

    An ITIN is assigned to individuals who are required to have a U.S. taxpayer identification number but do not have, and are not eligible to obtain, an SSN. This includes:

    • Nonresident aliens filing a U.S. tax return.
    • Resident aliens filing a U.S. tax return (unless they are eligible for an SSN).
    • Dependents or qualifying children of U.S. taxpayers.
    • Dependents or qualifying children who are nonresident aliens and have U.S. tax reporting requirements.
    • Individuals who are nonresident aliens and claim tax treaty benefits.
    • Individuals who are nonresident aliens and are required to file a U.S. tax return, or are claimed as a dependent on a U.S. tax return, but have not been issued an SSN.

    What You Need for the W-7 Application

    To apply for an ITIN, you must complete Form W-7 and submit it with original and certified copies of identification documents and a federal tax return. The required documentation includes:

    • Form W-7: Completed accurately with all required information.
    • Federal Tax Return: You must file a valid U.S. federal income tax return with your W-7 application, unless you qualify for an exception (such as claiming tax treaty benefits or being a dependent). The tax return is the primary reason for needing an ITIN.
    • Original Identification Documents: You need to provide original or certified copies of identification that verify your identity and foreign status. The most commonly accepted document is a passport. If you don't have a passport, other documents like a national identity card, driver's license, birth certificate, or visa may be used, but you must provide at least two documents from the IRS list if a passport is not submitted.

    Application Methods for Form W-7

    There are three primary ways to submit your Form W-7 application:

    1. Mail to the IRS ITIN Operation: You can mail your completed Form W-7, along with your federal tax return and original or certified identification documents, to the IRS ITIN Operation at the address mentioned earlier. This method requires you to send original identification documents, which the IRS will return to you. Processing times can be lengthy.
    2. Apply Through a Certified Acceptance Agent (CAA): You can apply through a Certified Acceptance Agent (CAA). CAAs are individuals or entities authorized by the IRS to help taxpayers apply for ITINs. They can review your documentation, verify your identity, and forward your application to the IRS. A significant benefit of using a CAA is that they can often verify your original identification documents and return them to you on the same day, avoiding the risk of mailing originals. Many individuals and businesses use services like itin.net to connect with CAAs.
    3. Apply at an IRS Taxpayer Assistance Center (TAC): Some IRS Taxpayer Assistance Centers offer ITIN application services. You can make an appointment to have your documentation verified. However, not all TACs provide this service, and availability can be limited. You must call to schedule an appointment and confirm they offer ITIN application assistance.

    Processing Times and Costs

    There is no fee charged by the IRS to apply for an ITIN. However, if you use a CAA, they may charge a service fee for their assistance. The IRS processing times for ITIN applications can vary significantly. Currently, it can take the IRS anywhere from 7 to 11 weeks to process a Form W-7 application, especially during peak tax filing seasons.

    If you are applying through a CAA, they can submit your application to the IRS on your behalf. The IRS aims to process applications within 7 weeks, but this can extend to 11 weeks or more during busy periods.

    Common Mistakes When Applying for an ITIN

    Several common errors can cause delays or rejections of your ITIN application. Being aware of these can help you avoid them:

    • Incomplete Form W-7: Missing information, such as your signature, date, or incorrect personal details, is a frequent issue.
    • Incorrect or Missing Tax Return: Failure to attach a complete and accurate federal tax return (unless an exception applies) is the most common reason for denial.
    • Improper Identification Documents: Submitting photocopies instead of original or certified copies, or providing documents that do not meet IRS requirements, will lead to rejection. Ensure your passport or other identification is valid and has not expired.
    • Incorrect Application Method: Not following the specific instructions for mailing or for using a CAA can cause problems.
    • Mismatched Information: Ensure the name and address on your Form W-7 exactly match the name and address on your tax return and your identification documents.

    What Happens After You Get Your ITIN?

    Once your ITIN application is approved, you will receive an official notice from the IRS, typically Notice CP-565, which will state your assigned ITIN. You can then use this ITIN for all future U.S. tax filings. It is essential to keep your ITIN secure and readily accessible for tax purposes.

    Using Your ITIN for U.S. Business

    Many individuals obtain an ITIN to facilitate U.S. business activities. This can include:

    • Opening a U.S. bank account: While some banks may require an SSN, many will accept an ITIN for opening accounts, especially for non-residents. Services like Mercury, Relay, or Brex are often accessible with an ITIN, facilitating business operations. You can learn more about opening a U.S. bank account with an ITIN.
    • Forming a U.S. LLC: If you plan to establish a U.S. Limited Liability Company (LLC), you will likely need an ITIN for yourself or the responsible party for tax reporting purposes, such as filing Form 5472, Information Return of a 24% Foreign-Owned U.S. Corporation or a Foreign Corporation Engaged in a U.S. Trade or Business. The formation of a U.S. LLC is a common next step for foreign nationals conducting business in the United States.
    • Obtaining an EIN: If your business requires an Employer Identification Number (EIN), you may need to apply for it using Form SS-4. While an SSN is often preferred, an ITIN can sometimes be used in place of an SSN when applying for an EIN, particularly if you are the sole proprietor of a business. You can find more information about applying for an EIN.

    ITIN Renewal

    ITINs do not expire. However, the IRS has a policy where ITINs that have not been used on a federal tax return for three consecutive filing years will be deactivated. If your ITIN has been deactivated, you must renew it by filing a federal tax return with your Form W-7 and a renewal application. The IRS will send a notice if your ITIN is scheduled for renewal. There is no separate renewal application; you simply file a tax return with the necessary documentation.

    Seeking Assistance

    Navigating the ITIN application process can be complex. If you are unsure about any aspect of the process, or if your situation is unusual, seeking professional help is advisable.

    Certified Acceptance Agents

    As mentioned, CAAs are authorized by the IRS to assist with ITIN applications. They can streamline the process, help ensure your application is complete, and verify your identity documents. Using a reputable CAA can save you time and reduce the chances of errors. itin.net can guide you to qualified CAAs.

    Tax Professionals

    For complex tax situations, or if you have questions about your U.S. tax obligations beyond just obtaining an ITIN, consulting a qualified tax professional or CPA is recommended. They can provide personalized advice tailored to your specific circumstances. Our specialist, Gokce Tandogdu, has extensive experience with ITIN applications and related tax matters. You can learn more about our team on the About page.

    If you have further questions about ITINs or related U.S. tax matters, our comprehensive Q&A section offers additional information. For direct inquiries, please visit our Contact page.

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