My 17 year old acquired a speeding ticket on his way home from college. We are wondering how to plea to keep this off his record

It is advisable to retain a local traffic defense attorney to represent him and handle negotiating the best possible plea deal.

Husband is in El Salvador and recently got a dui and we have an interview at embassy Nov 21?

He will likely be questioned extensively about the dui. He should be prepared to provide evidence of rehabilitation.

Trying to find away to get my mother-in-law here to visit with her grandchildren for Christmas ?

It is unlikely that she will be issued a B visa. However, it doesn't hurt to try applying with a lot of evidence of strong ties to home country.

Is H1 transfer possible in this case? What are my options?

I agree with the previous answer. You should work for Company A prior to transfer.

Can I inherit?

It depends. It is advisable to privately consult with a probate attorney on matters like this.

I have 10 years approved R1 Visa, Can I get SSN?

R-1 visas are not given for 10 years.

Can charge be dismissed

You should talk to the prosecutor and/or clerk of court and have your dob corrected. Better still, hire a local defense attorney to represent you...

A status letter is only needed if you were a U.S. resident between the ages of 18 and 26.

Will I be able to take an overseas expat assignment (2 years) after applying for N400?

Depending on the office, N400s are taking about a year to be scheduled for an interview. You should submit Form N470 prior to taking an opportunity...

H1B petition approved by Emp A, then transfer rejected by Emp B.

It depends on the reason for denial. You may be able to reapply.