Notify IRS about your new SSN & rescind ITIN
Individuals who are not eligible to receive a Social Security Number (SSN) instead get an Individual Tax Payer Identification Number (ITIN).
An alien individual can't have both an ITIN and a SSN. Therefore, once you receive your SSN (e.g., after getting an EAD), you will have to rescind your ITIN.
After you receive your new SSN, you will have to send a letter to the IRS ITIN Unit requesting a rescind of your ITIN. The SSN will become the primary number and must be used for all future filing purposes. The IRS will void the ITIN. All prior tax information under the ITIN will be associated with the new SSN.
Send a letter to:
Internal Revenue Service
ITIN Operation
P.O. Box 149342
Austin, TX 78714-9342
Enclose the copies of your ITIN and SSN.
You will then receive a letter from the IRS confirming that your ITIN was revoked and to use your new SSN for all tax purposes.
source: http://www.immihelp....etting-ssn.html
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How to Transfer Your Credit History to a Newly Assigned SSN
When you are assigned a new Social Security Number (SSN), your previous credit history will not automatically transfer. Credit history is not kept by the Social Security Administration. Instead, the three major credit bureaus, Experian, TransUnion and Equifax, keep their own records of your credit history. Therefore, to transfer your credit history you will need to notify each of the credit bureaus directly and provide evidence of your claim.
1. Contact your current lenders and inform them of your newly assigned SSN. They should begin to report your credit under your new number.
2. Type a letter to the credit bureau, explaining that you have a new SSN. Keep the letter simple and to the point. List all previous numbers you had credit under and any previous names you used. Request that your account be listed in your new credit report.
3.Print four copies of the letter, one for each of the three credit bureaus and one for your own records. Sign the three copies for the credit bureaus.
4. Address one envelope to each credit bureau, affix a stamp and write your return address. The three credit bureau addresses are as follows:
Equifax
P.O. Box 740241
Atlanta, GA 30374
Experian
P.O. Box 2002
Allen, TX 75013
TransUnion
P.O. Box 1000
Chester, PA 19022
5. Make three copies of the document you received from the Social Security Administration informing you of your newly assigned SSN. Attach one to each letter and put each letter in an envelope. Mail the letters to the credit bureaus.
6. Wait a month or two and request a free copy of your credit report through AnnualCreditReport.com from each credit bureau. Verify that your credit history has been transferred by each credit bureau. If it has not, call the credit bureau in question to sort out the problem.
Equifax
1-800-685-1111
Experian
1-888-397-3742
TransUnion
1-800-888-4213
source: http://www.ehow.com/...signed-ssn.html
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Notify Selective Service (males 18-25 yrs old only)
If you are a man ages 18 through 25 and living in the U.S., then you must register with Selective Service. It’s the law. According to law, a man must register with Selective Service within 30 days of his 18th birthday. Selective Service will accept late registrations but not after a man has reached age 26. You may be denied benefits or a job if you have not registered. You can register at any U.S. Post Office and do not need a social security number.
When you do obtain a social security number, let Selective Service know. Provide a copy of your new social security number card; being sure to include your complete name, date of birth, Selective Service registration number, and current mailing address; and mail to:
Selective Service System
P.O. Box 94636
Palatine, IL 60094-4636
source: http://www.sss.gov/default.htm
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Do not forget to contact your bank and/or any other relevant institution (school, memberships, etc.) about your new SSN.