Girls, hi! We need to urgently move from our city to another one, 3 ho…

Girls, hi! We need to urgently move from our city to another one, 3 hours away. I'm on my local register in my current city and need to transfer to this local hospital. What do we need to do for that? The deadline is 30 weeks, I'm worried about being forced to go back and forth or fill out any statements there. Can you tell me what to do? Who has faced such a problem?