You will need to set up your Amazon selling account for the online marketplace where you want to sell. Even if you already sell in one Amazon marketplace, you will need to create a new seller account in another marketplace. For example, if you sell on Amazon.com and want to sell on Amazon.co.uk, you need to create a new Amazon seller account for Amazon.co.uk.
The exceptions are:
Create a seller account in an Amazon marketplace by clicking on one or more of the links below:
Amazon.sa (Kingdom of Saudi Arabia)
Amazon.ae (United Arab Emirates)