Priority Date

I am currently on H1B visa(3rd year) and few days back I got my I-140 approved in EB-2 category. I want to know if I can change my employer and retain my priority date.

I am planning to switch from Employer A to B. Can you please help clearing some confusion i have.
Moving from Employer A to Employer B with I-140 approved.

1: If Employer A revokes I-140 and Employer B files a new petition I can retain the priority date. Does Employer A have to revoke I-140 or if he can continue it even if I am not working there?<br>
2: If Employer A doesn’t revoke the I-140 and Employer B files a new Labor and I-140 petition and retains the PD of previous I-140, would the previous I-140 be valid anymore?<br>
3: If Employer B files a brand new PERM and I-140 with new PD (2020) and Employer A I-140 is valid with the old PD. What happens if the old PD becomes current. Do I need to go back to old employer A or Employer B can file I-485 with the old I-140 PD.<br>
4: Is there a one year max limit rule on filing the I-485 once the date becomes current? What if it cannot be filed, does that void approved I-140?

My I 485 priority date is Feb 2018 (EB1B) and I am expecting as per current trend to receive my green card by December. I have greencard EAD valid until June 2021.

However, I have enrolled for Fall 2020 semester in MIT to pursue a one year MS degree in System Design and Management. I am sponsored by my employer and I will be paid as a fulltime employee during this period. I will be writing a research thesis on a topic related to my company.

On receiving green card, Do I need to discontinue my degree in between and immediately return to my previous position as a fulltime researcher in the company for which my greencard was filed?
I

I'm working in an organization since December 2009. When my green card was filed in January 2016 my job title was "Senior Engineer", and the roles and responsibilities included following -
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· Generally someone with industry knowledge and/or software knowledge
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· SME in multiple areas
· Able to assist in even more areas
· Able to work without management intervention
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My I-140 is approved, and Priority Date is January 2016. I'm due for promotion to the job title "Consultant", and the roles and responsibilities would be following -
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· SME in a lot of areas
· Able to work in any area
· Able to talk accurately about the whole product whenever and wherever regardless of audience
· “Manager” on the floor, a mentor to “all” that need help, trusted adviser
· The one that the Engineer level people go to and want to be
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My Manager and HR mentioned that they will have to file amendment for change in roles and responsibilities that matches with new title. They are concerned about filing amendment, and they mentioned that they are seeing less than 50/50 success rate and there is high risk involved in changing title as my green card might get declined.
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I'm very surprised that changing only couple of responsibilities can jeopardize my green card processing, and I'm also finding it unbelievable that I can't get any promotion within same organization till my GC is approved, which could be another 10-15 years.
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I thought since green card is filed for the future position, so there should not be much risk involved in filing amendment. I've seen many of my friends and family getting promotions within same organization after their green card process started. Since I'll be working in same organization and same team, and there is no drastic change in roles and responsibilities, so do we still have to file amendment? Can the amendment be filed later with I-485, or is it better to go back to old job without filing amendment?

My Employer has filed my GC in 2014 and I got my I140 but if I want to change a different role within my organization (Changing Cost center), will that impact my current GC processing. Should they start the GC processing from the begining ?

I have been working on H1B for a IT consulting company ( employer A), at a client location. My employer will file for I 485 in about 2 months. I am thinking of a few alternatives and wanted to understand the scenarios in which my GC petition might get cancelled or denied by the USCIS or considered abandoned by me. What precautions I need to take if I follow any of the below scenarios.<br>

1.Take a job with a different employer ( may or may not be same/similar to the job with employer “A” )<br>
2. Leave and join a graduate program full time ( may be after I get EAD, so that I do not have to change to F1 student visa)<br>
3. Leave the employer A and leave the USA, go to home country, India. I may or may not take a job in India which may or may not be same/similar to the job with employer “A”