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谢谢您的信息，就是说卡比approved notice 更有用。

-Correct. The physical green card is accepted by everywhere (i.e., between USCIS, you and public) and the I-485 approval notice is only accepted by USCIS unit (i.e., between you and USCIS only). For example, your employer will not accept your I-485 Approval Notice,, but accept your green card only for the employment.

我是否可以在其他州的SSA 办公室 去Update 我的SSN？

-Yes. But the new SSN card will be sent to the address where you update the card.

比如我有2个州的住址（来回跑），申请485时，所有文件留的是NJ 地址，Approved notice和卡都寄到了NJ地址，

但我是否可以在FL Update 我的SSN？如果可以在FL 更新SSN，是否需要提供额外文件？

-The green card is enough.