Could my uncle invite me to US?

If you want to study in the U.S. you need to start with the school that will issue Form I-20 to start your paperwork. Your uncle can be a...

Should we register our marriage with the authorities of our country or we can only have the American registration?

You only need to get legally married in the U.S.

Do I need to file I485 supplement a?

No, you do not need this form. I hope this will help: https://www.iv-law.com/immigration-lawyer/green-card/green-card-marriage/

I'm a Nonimmigrant living in US, my sister a Naturalized citizen living in India and filled green card for my parents?

If you are not lawful permanent resident you cannot be a joint sponsor but you can transfer the money.

Hi?

I am not sure if I understand your question correctly. If there is I-130 petition where you are the beneficiary is approved, and you are in the...

USCIS has some problems with their website case status. Call the 1-800 number to get the status of your case.

If your advance parole application is approved then you can leave and come back. Good luck!

Police certificate

Police records are not available and so are not required for residents of Iran.

DS160, Question "have you ever been unlawfully present, overstayed the amount of time granted by an official..."?

The USCIS has your record. So when in doubt it is always better to say 'yes' and explain things. The "yes" answer will not make you inadmissible...

No, it will not affect her H4 process because it is not tied up to specific employer. Good luck!