Thank you for the info. I was told that H1B employee cannot take paystub from the Entity with a different EIN number that was not approved in a 797 receipt. The State does have a DBA document available that shows all entities are governed by same franchise. However, my employer is suggesting to file an amendment petition with an extension and then I go to home country for a consular processing and re-enter United States with a new visa stamp.
My question is, Is it necessary to go for a consular processing right away if I have not really violated my status by inadvertently working for this entity?