I would leave it alone.
If for some reason you really want to let the IRS know so they can combine you tax information into one file, use the procedure below (which normally applies to ITIN holders who get SSNs, but the address would be the same.)
What do I do when I am assigned a social security number (SSN)?
Once you receive a SSN, you must use that number for tax purposes and discontinue using your ITIN. It is improper to use both the ITIN and the SSN assigned to the same person to file tax returns. It is your responsibility to notify the IRS so we can combine all of your tax records under one identification number. If you do not notify the IRS when you are assigned a SSN, you may not receive credit for all wages paid and taxes withheld which could reduce the amount of any refund due. You can visit a local IRS office or write a letter explaining that you have now been assigned a SSN and want your tax records combined. Include your complete name, mailing address, and ITIN along with a copy of your social security card and a copy of the CP 565, Notice of ITIN Assignment, if available. The IRS will void the ITIN and associate all prior tax information filed under the ITIN with the SSN. Send your letter to:
Internal Revenue Service
Austin, TX 73301-0057
I would leave it alone.
If for some reason you really want to let the IRS know so they can combine you tax information into one file, use the procedure below (which normally applies to ITIN holders who get SSNs, but the address would be the same.)
What do I do when I am assigned a social security number (SSN)?
Once you receive a SSN, you must use that number for tax purposes and discontinue using your ITIN. It is improper to use both the ITIN and the SSN assigned to the same person to file tax returns. It is your responsibility to notify the IRS so we can combine all of your tax records under one identification number. If you do not notify the IRS when you are assigned a SSN, you may not receive credit for all wages paid and taxes withheld which could reduce the amount of any refund due. You can visit a local IRS office or write a letter explaining that you have now been assigned a SSN and want your tax records combined. Include your complete name, mailing address, and ITIN along with a copy of your social security card and a copy of the CP 565, Notice of ITIN Assignment, if available. The IRS will void the ITIN and associate all prior tax information filed under the ITIN with the SSN. Send your letter to:
Internal Revenue Service
Austin, TX 73301-0057
You will need to contact the IRS to resolve this issue. I've never heard of someone actually accomplishing filing and tax payment using a fake SSN and fake name. But I'm quite certain that no one here will be able to assist you.
The IRS telephone number:
800-829-1040
The IRS is happy to take the money. It's actually a bit of a scandal, the number of fake SSNs in the system, or the number of taxpayers whose SSNs have been used by undocumented persons to pay their correct tax, and the IRS never tells the original taxpayer, because they are just happy that the undocumented person is paying proper taxes.