I am working on H-1B for Employer A. I want to switch jobs and need a study time for about 3-5 weeks full time. I was thinking if I could go an unpaid leave from my current job for 5 weeks, and use this time for my preparation? It gets tricky as I cannot tell my current employer the actual reason for my intended leave. How will my H-1B status get affected due to this? Can I be in the US during this time? If yes, under what conditions?

What is the likelihood that because of working in a dis-similar job, for a different employer, on EAD , my I-485 ( and the GC ) could be denied?

Wife's H4 change of status application (I-539) and EAD (I-765) filed concurrently and in process. Can she travel outside country, get H4 visa stamping done and reapply separate EAD (I-765) again?

My father recently renewed his B2 Tourist Visa - and was given the 10-YR Multiple entry visa. He is currently visiting USA and his current I 94 expires in end of May 2019. Due to some medical issues - we were contemplating about requesting a 2 to 3 months extension for his stay - if possible. Would you necessarily have to provide an evidence in the form of a return ticket (about 3 months hence from end of May 2019) - to prove that he indeed intends to go back