Can I do my H1B extension with I-140 initiated by previous employer ?

Only one I 140 is required. Discuss with your New employers immigration attorney to determine if they believe it is acceptable as they are the...

For immigration purposes unauthorized employment is any service for labor performed for an employer within the United States by a foreign national...

Break before joining next employer after H1b transfer?

If you depart the US yes take a break. If you remain in the US you run risk of dropping out of status. Talk with your new employer's immigration...

What should I do if my H-1B Extension has been Denied & my Employer is filing the MTR?

Best to talk with the immigration attorney that is preparing the MTR for you employer. Also premium process may be helpful.

As petitioner you will submit an affidavit of support binding you for 40 quarters or until your spouse becomes a US citizen that you will be...

J1 to green card

Maintaining your J status is the principal thing to do while you are attempting the resident status.

H1b amendment and H1 transfer and going back to old employer having pending amendment? Any risk ?

The Employer A petition may or may not be approved. Wait for an approval and minimize the impact if the transfer is not approved.

Can one apply for H1 extension with approved i140 from previous employer,if labor for gc is approved ?

An approved and valid I-140 is required. One is sufficient.

What kind information they get about you and asking you while the interview for citizenship based on 3 years VAWA ?

For general information about what is involved in the information for naturalization see the N-400 application. The examiner may ask anything...

Can I get adopted by my legal guardian as an f1 visa student?

You may be permitted to be adopted. You should check with a family law attorney from your area. Being adopted will not provide any immigration...