H1B Extension premium processing question

Your best bet is to pay for a consultation and see an immigration lawyer. Having said that i don't think you are qualified.

One way ticket for my Granmother who just received her Immigrant visa (IR-5 parent of US citizen)

She should not have any major problem. She will be questioned at the port of entry due to trump executive order.

I don't know..If your VAWA is denied, there is a good reason for that. You need to discuss this with a lawyer.

How long will it take to get a permission to start an LLC after marrying an American citizen?

U=You may create a LLC and register the name. You do not have to be a green card holder to do that. As to the rest of your kitchen sink questions,...

Traveling with L-1B Blanket - change of address / mail service

You need to provide an stable address or POBOX to USCIS.

You need to obtain a letter from the county and provide that to the officer. Explain yourself to the officer.

DS160- What should be my answer-Have you ever been unlawfully present, overstayed the amount of time?

You may be subject to 3/10 year bar and i suggest that you consult with an experienced lawyer.

Affidavit of support please help!!!!

The support you received was for the US citizen child. I do not see you having an issue.

How long does it take to have result of I - 824? And what is the steps until we can reunion in Usa?

You need to consult with either the company lawyer or hire a lawyer to assist you now.

If the withholding is granted by immigration judge, then he should be released. However, the OCC may filed for an appeal and he would have to...