If you are served by the USA Hub, you likely will be getting an email today (or soon).
I received my email just now … here is what the EMail said (in case you didn’t get yours yet):
This is the link that they refer you to in order to verify that your shipping address is still correct:
Make sure to SCROLL DOWN a bit. You won’t see what you are looking for till the very bottom :)
UK backer here, I got the same email!