Filed my last tax returns with Tax ID number. Last year I got a social security number and would like to use it for filing my current tax returns. Anything I should know before I file?

[davicarleial]

I read somewhere that if you file using a social security number for the first time when in the past you used Tax ID number you should enter $0 for AIG. I didn't find that option. The option to enter your AIG is when they ask your last year AIG to confirm identification when using e-file. Is that where I would enter $0?

[JaimeG]

Yes, you should enter -0- for the AIG if you are using a different Identifying Number. Additionally if you have filed before with the IRS using an ITIN you need to Rescind that particular ITIN. The explanation and instructions are below:

Once a SSN has been issued, you must use this 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 they 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