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The fact that your wife does not have a SSN yet does not stop you from filing joint.
You would need to complete form W7 to apply for an IRS Individual Taxpayer Identification Number (ITIN). An ITIN is a nine-digit number issued by the U.S. Internal Revenue Service (IRS) to individuals who are required for U.S. tax purposes to have a U.S. taxpayer identification number but who do not have and are not eligible to get a social security number (SSN).
If your wife is not eligible to get a SSN then you send your joint return with the W7 form.
An ITIN would be assigned to her and then your return would be processed.
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