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Do not amend any returns that were completed before your wife received here individual taxpayer identification number (ITIN).  The number to call the IRS can be used if you choose to find the current status of your request to change the ITIN to a social security number (SSN). Do not use the ITIN going forward any longer.

Keep in mind that the Social Security Administration and the IRS exchange information regularly.

• (January - April)  800-829-1040

  • Telephone service wait times can average 15 minutes. Some telephone service lines may have longer wait times.
  • Telephone service wait times are higher on Monday and Tuesday, during Presidents Day weekend and around the April tax filing deadline.

The steps to inform the IRS about receipt of the SSN: 

Once you qualify and obtain a SSN, you are required to notify the IRS of the change and discontinue using the ITIN. Once notified, the IRS will combine your tax records and begin using your SSN. Because the IRS automatically combines all of your tax records, you do not have to file an amended return to change the ITIN to a SSN. The IRS will automatically make the change to your tax return once it receives your request.

1. Write a letter to the IRS requesting that your ITIN be combined with your new SSN. Include your name, ITIN, Social Security number and mailing address. 

2. Make a copy of your Social Security card.

3. Make a copy of your CP565 notice, which is the Notice of ITIN Assignment you received from the IRS when assigned your ITIN. 

4. Attach the copies of your Social Security card and the CP565 form to the back of the letter. 

5. Sign and date the letter. Mail all three documents to: Internal Revenue Service Austin, TX 73301-0057

For more information use this link: Additional ITIN Information