When filing for an O1 visa through expedited processing, what is the earliest start date can one put?

Marked start can be any day going forward which would be different from actual start date of employment. It would be ideal to have date closer to...

What is the average processing time if issued an Request For Evidence?

Processing times could vary. In a different kind of application I have had approval in about 2-3 weeks after responding to rfe.

My I130 was approved but i didn't get the mail?

Check at the local field office over an infopass appointment or call customer service. If not hire help!

What is a general procedure after unauthorized drop below full course load on F1 violation?

Contact the school if they will accept you first and will issue I-20 since you are terminated. Next, you most likely need a visa and would have to...

I am a US citizen and I want my dad to become a resident?

Returning by ice multiple times is a red flag, most certainly. You may want to confirm with private advice though.

Will I not be able to come back to visit US again?

I do not think it is a problem at all for students especially if you completed the course. you may want to seek private advice on interview for...

yes subject to the limitations of J1 that may apply to you.

My spouse filed I-539 from J1 to B2 for him and the rest of the family. He got an H-1B visa meanwhile. Can I file another I-539?

You can benefit from seeking legal advice in private.

How can we avoid an I-751 denial after rough interview?

You could provide more evidence or just wait for a decision, if it comes. Your question is factual. In order to advise you on what could be done...

I have a immigration case open. It's under the national benefits center which is my local office?

Processing is delayed in many cases depending upon how the filing was done. Most cases are taking longer now a days, generally.