Ex US permanent resident ssn

As I'm going to start working on filing taxes soon, just curious about whether we still use my British husband's social security number although he just forfeited his US permanent residency a couple months ago.  I can see it making sense for this year since he only just turned it in in October. But wondering if this social security number will still apply for him in the future (like when we do taxes for next year), or do they reassign them to new 'aliens'?

OK - the good news, he keeps his SSN for ever so he can collect social security when he is old enough.

I assume he has a signed and approved I-407 abandoning his green card.

On the downside, for 2007 he will have to file a dual status return reporting worldwide income up to the date of abandonment.  Depending on how long he had the green card this may need to be an expatriation return - see form 8854 for details.

You will have to file seperately from now on continuing to report worldwide income such as earnings, child benefit etc. 

You can also elect to file jointly with him (rather than filing separately) if you want to.  Once you make this election, you must continue to file jointly with him.  At some point, you may change your minds and cancel the election.  After you have cancelled the election, you can not re-elect to file jointly for at least five years.

Alternatively, you file a 1040 as either (if you have kids) Head of Household or (if you don't) Married Filing Separate; and you husband files a 1040NR (if he has any US source income) as Married Filing Separate.

You would only file jointly with him if he doesn't make much money.  If he makes more money than you, or about the same, you'll probably save much more money filing apart.

thanks for the advice, I'm glad I asked!