H1B rejected. Employer not giving return package and not telling reason for rejection. What can I do to know reason.

The employer has no obligation to disclose this to you.

I went in Chicago from Canada with waiver visa valid in my old passport & cbp officer wrote 'dt' in my new passport. Why?

You did not properly update your ESTA record.

Effect of Switching Jobs (moving around) on N400 application of a divorcee?

It should not have an effect so long as you are honest about the moves and job changes.

You should speak to the attorney who originally filed the LCA.

I am on opt and it's ending in February 2014. My grandmother is a green card holder, can I apply for immigration through her?

You will need to apply through your dad. Be prepared for a long wait if you are over 21 or married.

Give it a couple weeks. If you do not receive it, call again or make an info pass appointment.

I would like to sponsor a child that is caught in this terrible deferred action influx of illegals. How do I register?

Your desire to help is commendable. Unfortunately, these children are generally not available for deferred action. You can help in other ways by...

Received wrong classification at POE. Tried making InfoPass to correct it, but the online system says no appt available. Help?

Keep trying to obtain an appointment. Follow the advice of my colleagues.

AR-11 Mistake? Re-submitted the correct form. Do I need to do anything more?

There is nothing else you need to do.

Green card holder be out of USA for 11 month

There will be a presumption that you have abandoned your residency. Speak to an attorney.