You can file for N-600 as soon as he enters the States. Please make sure that you meet all the other eligibility criteria.

You should be eligible to apply in 4 years and 9 months from the validity date of your green card. Make sure you meet all the other requirements as...

It depends on what route you are thinking of exploring. You'll need to talk to an immigration attorney to see if he may be eligible for family...

It may take upto 3-4 weeks for USCIS to cash checks. If your father and mother's application were in the same packet, it may be possible that USCIS...

There are several ways that he can immigrate to the US and get a work permit. Fiancé visa has a long processing time, it might be easier to do a...

As long as you have a valid visa, you should be able to enter. If you have an expired visa, you will need a new visa based on the new extension.

You can sponsor her on J2 dependent. Make sure to mention the denials while filling out the forms. She may be eligible for a change of status to...

It probably will be an issue either way. For change of status from F1 to H-1b, you need to be in a valid status. For consular processing, you are...

Once you file for AOS, make sure you also apply for a work permit. Once you get the EAD card, use it to apply for SSN.

Yes, you should be able to re-apply. However, please pay extra attention to questions on the forms since the answers may change after denial.