Great info here. I too want to transfer my taxes to my new social.
For the last few years i have used my ITIN and a SSN that i got of the streets and turns out it belongs to some one.... I dont have any credit on my ITIN ( i dint even know this was possible i thought it was just for tax purposes ONLY) I just want to transfer my tax records and build new credit.
Reading all the pages it looks like the IRS will automatically link up both numbers. I just want to make sure it happens last thing i want is to owe taxes.
How will the IRS know to link up the ITIN with the new social? Dosent it already think that ITIN is associate it with the "other Social"?

How did some of you just go to the SS office and say... oh i have a fake social that may or may not belong to some one that i been using for the past years associates with my ITIN... i want to transfer those eranings into my new SSN... I would be scared shitless!!!

PS: i am so freaking stocked!!!!