Is it legal to cancel citizenship test after passing it and do another one?

I would have to read the letter to understand what they have scheduled for him. There may indeed be more to this story.

It might be time for a chat with an attorney. It depends how long ago you sent it in, whether you should be worried or not.

Police clearance certificate from India

You have to wait for the final decision. So, no, it is not yet approved.

I-130 Alien relatives?

If you are currently in lawful status you may be able to adjust.

Prima facie approval is just preliminary. You still may receive a request for evidence and have your application denied or approved. It is good...

Can i apply for green card

There is no way for you to currently file for relief, outside of immigration court. With your family gone, it will be difficult to show the...

Can I work without actual EAD card?

If you have not received the actual card, you cannot yet work.

You need to keep the USCIS updated with your current address. It is not appropriate to conceal your address. Make sure that the information...

Advance parole renewal?

It would be best to return while your advanced parole is still in effect.

Check the visa bulletin to determine which priority dates are currently being processed.