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Hello, 

I recently got my wife's SSN. Can I just file my 2020 Tax Return with my wife's SSN and not send letter to IRS to rescind it? Will IRS automatically rescind it when they receive my 2020 Tax Return? Or can I send the letter along with my 2020 Tax Return as I will not be able e-file my Tax Return and would have to mail it in?

Any help is appreciated.

Thanks.