Which alien registration number should I use for EAD renewal? I was issued one years ago and different one on last EAD.

I would list all A numbers though the card will likely be issued with the same A number as your current EAD.

For an estimate check the processing times at www.uscis.gov

OPT to O1-B visa?

Once the change of status is approved the next trip out of the US will requore a stop ata IS Embassy to get the O1 visa in passport before reentry.

Do i need to file I-485 Supplement A? i am a naturalized US citizen and filing 1-485 for my mother.

Assuming she enterednlegally you file I-485 bit not I-485A

How long does it will take to get a interview date?

Based in recent experience of my clients 6 months is the minimum but likely 8-10 months.

I got ACD in September 28th,when it will end ,my history and all fingerprints will be clean ?

You will always have to admit you were arrested and show immigration the dispositon.

Filing for son and grandson

Your grandsons name will go on application. In order for him to process for a green card through the petiton for your son, your grandson will have...

Lost and expired green card

What were the charges? Did they result in convictions? Have you checked the status of the application online?

My son was sentenced to Willard on a vop. He was sentenced 31 days ago and still has not been sent there. How long do they have?

This seems like a question for a criminal law expert not immigration. I am reclassifying.

I filled for my immigration papers work

What did the rejection letter say? Was the submitted fee correct? Was each form signed ? Was it sent to the correcr address?