Re: How to update spouse SSN in place of ITIN. Las... - Community
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Get your taxes done using TurboTax

@Gullu13 Firstly, you have to send the letter including your ITIN AND SSN copied to let IRS know you got SSN, the address was on the top of the topic, about 6-8 weeks they will automatically combine them with your SSN, they will send you the notice when they’ve done. But if you check your tax return for prior years and don’t see the amount changing. So, go ahead and do amend 1040X forms. That will take 16 weeks from the day they got the form. 

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