Do I need to go for stamping again after transfer ? Am I going to have any impact in future ?

Your new employer should file first before quitting and it may be better to have approval in hand. Speak with your new employer's immigration...

Can I apply for change of status from H4 to H1 without facing any issues from USCIS?

As my colleagues suggest more information is needed. Best to speak with your employer's immigration attorney.

Can i apply for h4 extension while my COS from h1 to h4 is still pending?

As my colleagues have recommended best to discuss this with your husband's employer's immigration attorney.

Can I travel to abroad on OPT STEM with recent rule making and the date postponed until May 10, 2016?

If your stem is not extended before departing you will likely not be permitted t return. The extension should be denied as you are no longer in the...

Possible mistake regarding questions 39 and 40 in N400

You have answered correctly. You can clear up at the interview or on notice of continuation if there is a question.

I concur with my colleagues assessments she is permitted to start a LLC.

Are we going to encounter any issues with the K-1 petition and (or) the Spouse K-3 visa be a wiser route?

The visa cancellation alone does not preclude your fiance from obtaining another visa to the US. I would, however, be somewhat concerned about the...

Is it possible for the process to get completed early enough so that I don't have to leave the country for a period of time?

To extend beyond the 6 year limit either a perm or Visa petition must be filed and pending or approved for at least one year

What is advisable for me

You may be qualified for H-1B. Best to work with your employer and through the employer's attorney as the employer needs to file the petition and...

Please suggest me what should I do? Should i transfer my case from Dallas to Raleigh?

You must provide a change of address AR-11 with CIS