Do I send W-7 with federal tax return or with state tax return of both?

Hi, I'm from France and I moved to Los Angeles almost 7 month ago, therefore, that's the first time I have to fill a tax return here. My husband is still in France for his work 'til the end of May. In order to fill my taxes return, I need to ask for a ITIN for him. I filled the W-7 on his behalf, but my question is: Do I send it with my federal tax return, with my state tax return or with both?

Thank you for your help

After you file

You will send the W7 with the federal tax return only.  For the state, write in "applied for" in the social security space and you can send them the ITIN once it is assigned.

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