Yes, you are able to update your personal information on your account at any point.
If you are wanting to update your email address, postal address or contact number you are able to go to your profile and edit any of the information there and click save.
If you are wanting to update your contact number you will be able to do so, as long as you re-verify your contact number.
If you have moved country and want to update your account country, you can see more on that here.