I left my job while waiting for I-485, after I-140 approval
I previously completed I-140 and even filed I-485, received work authorization, and was working — but then I left that job, and I’d like to restart this process with a new employer. Do I need to go through the entire process again from scratch?
If your I-140 was already approved, you can reuse it. You can proceed by updating your I-140 as part of filing your new I-485.