I am a manager myself and I would consider letting me know ahead a very professional thing to do. So I would recommend letting your employer know about your rel

I am a manager myself and I would consider letting me know ahead a very professional thing to do. So I would recommend letting your employer know about your relocation as soon as it is 100% sure. You never know, maybe your current employer might consider offering you a job in your new hometown or even write a letter of recommendation for possible new employers. Think about how your boss would refer to you when somebody asks a reference from him/her. I think you could gain a lot by working together with your current employer knowing that you are leaving