Gokce Tandogdu
ITIN Specialist, itin.net
You cannot directly merge tax filings from an ITIN to a new SSN retroactively. Instead, when you obtain a Social Security Number (SSN), you will use it for all future tax filings, and the IRS will associate your past ITIN filings with your new SSN. The key is to ensure the IRS correctly links your tax history. This process is not about merging old tax forms, but about updating your primary identification number with the IRS for all tax years going forward.
Obtaining a Social Security Number (SSN)
The first step is to obtain an SSN. You are generally eligible for an SSN if you are an authorized worker in the United States. This includes individuals with work-authorized visas, permanent residents (green card holders), and certain other categories. If you have recently become eligible for an SSN, you will need to apply for one using Form SS-5, Application for a Social Security Card, at a local Social Security Administration (SSA) office. You will need to provide documentation proving your identity, age, and U.S. work authorization. The SSA will then issue you a Social Security card with your unique SSN.
What Happens to Your ITIN and Past Tax Filings
Once you have an SSN, the IRS will eventually update your record to reflect this new primary identifier. Your ITIN (Individual Taxpayer Identification Number) is issued by the IRS solely for tax purposes to individuals who are not eligible for an SSN. It is not a work authorization document. When you file your first tax return using your new SSN, the IRS system will recognize this and begin to associate your ITIN-related tax history with your SSN. You do not need to file a special form to 'transfer' or 'merge' your tax history. The IRS system is designed to link these records automatically based on your personal information (name, date of birth, etc.) and the introduction of your SSN on subsequent filings.
Your past tax returns filed under your ITIN remain as they were filed. The IRS does not 'merge' them in the sense of creating new historical documents. Instead, they update your taxpayer profile to show your SSN as your primary identifier moving forward. This ensures that any future tax correspondence, refund processing, or audits are correctly linked to your overall tax record under your SSN.
Filing Your First Tax Return with an SSN
When you file your next U.S. federal income tax return, you will use your new SSN exclusively. Do not use your ITIN on this return or any future returns. If you are filing a tax return for a year in which you had both an ITIN and an SSN for part of the year, you generally use your SSN for that entire tax year. This is because the SSN is your primary identifier from the date it was issued. For example, if you receive your SSN in July 2023, and you were a U.S. resident for tax purposes for the full 2023 calendar year, you would file your 2023 tax return using your SSN. The IRS guidance generally states that once you are issued an SSN, you must use it for all tax purposes.
Ensure that the personal information on your tax return (name, date of birth, etc.) exactly matches the information used on your previous ITIN filings and your Social Security card. Discrepancies can cause delays or prevent the IRS from correctly linking your records. If you have filed Form 1040-NR, Nonresident Alien Income Tax Return, in the past, and you are now a resident alien or a U.S. citizen eligible for an SSN, you will likely transition to filing Form 1040, U.S. Individual Income Tax Return, if you meet the residency tests.
What if I Have Filed Jointly with a Spouse?
If you have filed joint tax returns with your spouse using your ITIN, and you now have an SSN, you should continue to file jointly if eligible. Your spouse will use their SSN (if they have one) or ITIN, and you will use your new SSN. The IRS will link these joint filings to your respective primary taxpayer identification numbers. The process of associating your tax history remains the same: the IRS system connects the dots based on the updated SSN provided on the current filing.
Common Questions and Potential Issues
**Will the IRS send me a notice?
It is possible, though not guaranteed, that you might receive a notice from the IRS if their systems have not yet fully reconciled your ITIN and SSN. This could happen if, for example, a refund is being processed under your ITIN while your SSN has already been reported on another filing. However, the IRS generally handles these discrepancies internally. If you do receive a notice, review it carefully and respond promptly with the correct information, including your SSN. Having a copy of your Social Security card and your past tax filings readily available can be helpful.
**Do I need to notify the IRS directly?
Generally, you do not need to proactively notify the IRS to 'merge' your tax information. Filing your tax return with your new SSN is the primary mechanism for updating your taxpayer identification. The IRS has internal processes to link your ITIN and SSN based on your personally identifiable information. However, if you encounter persistent issues, such as duplicate tax IDs appearing on IRS correspondence, contacting the IRS directly or seeking assistance from a tax professional is advisable.
**What about state taxes?
Similar to federal taxes, you will use your SSN for all state income tax filings going forward. Most states have reciprocal agreements or data-sharing arrangements with the IRS, so they will also update their records to reflect your SSN. You should check with your specific state's department of revenue or taxation for any state-specific procedures, although typically, using your SSN on your federal return will prompt the state to update its records accordingly.
Considerations for Business Filings (EIN, LLC)
If your ITIN was used for business purposes, such as establishing a U.S. LLC or obtaining an EIN, the transition to an SSN may require some updates. When you obtained an EIN (Employer Identification Number) using your ITIN, that EIN is permanently associated with your business entity. However, if you are the responsible party for the business and now have an SSN, you will use your SSN for all future business-related tax filings, such as Form 5472, Information Return of a 25% Foreign-Owned U.S. Corporation or a Foreign Corporation Engaged in a U.S. Trade or Business, if you formed a U.S. LLC with a single-member structure and are a foreign owner. You do not need a new EIN; you simply use your SSN when filing forms related to that EIN.
If you are planning to form a U.S. LLC or obtain an EIN, it is generally more straightforward to use an SSN if you have one. However, obtaining an ITIN is still a common and valid pathway for non-residents to establish these business structures. The process of how to merge taxes from itin to new ssn primarily concerns your individual income tax filings, but it's good practice to ensure your business filings are also aligned with your primary identification number where applicable. For business formation and EIN applications, services like itin.net can assist non-residents even without an SSN.
How to Get Professional Assistance
While the IRS system is designed to link ITIN and SSN records automatically, complex tax situations can arise. If you have filed taxes for many years under an ITIN, have complex business dealings, or are unsure about the transition process, consulting with a qualified tax professional or a Certified Acceptance Agent (CAA) is recommended. They can review your specific situation, ensure all your records are correctly updated, and help you navigate any potential IRS correspondence. For those seeking to obtain an ITIN, using a service that partners with CAAs can streamline the application process. For assistance with EINs or U.S. LLC formations, specialized services are also available.
Understanding the distinction between an ITIN and an SSN, and how the IRS manages taxpayer records during this transition, is key. The goal is always to ensure your tax history is accurately represented under your permanent identification number, facilitating future compliance and financial activities in the U.S.