Hello,
I am trying to create an account on Amazon US website. When i try to enter my address, it gives me an error on zip code. It seems like it only accepts the 4 digit code as i cant enter a 5 digit ( US post codes), but when i enter my zip, it turns red and asks me to enter a valid zip or area code. Any suggestions?
It's detecting you're from Australia most likely and restricting you to a 4 digit postcode.
Try talking to Amazon Support perhaps.