If you have had permanent residence for two years, but only lived together since January, it is a problem. Provide evidence of your good faith...

October 1st is the first day of the fiscal year. That matters for people who are issued new H1b's. They cannot start until October 1st. But if a...

Yes, you should follow up with customer service. It should not take this long.

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Could be. Perhaps it depends on whether you are registering for the first time, or renewing.

The two are unrelated. If you don't get it by the time you receive your green card, then go to the Social Security Administration and apply for it.

They will not admit you into the U.S. if you intend to change status once you arrive.

CIS does not register anyone for the selective service. Provide the letter instead.

You need to file an application for extension of status with USCIS.

For example, if you are living off of savings, send your most recent statement. If a friend is paying for you, submit an affidavit of support with...

Correct, if the petitioner does not have sufficient income you need a joint sponsor who does.