@Seller_jgc3LAvvrplib

My name is CR and wanted to jump in here to provide you with some additional information here.

@Seller_OvL8C4BJWiuS9has hit the nail on the head above for you, I only wanted to provide some additional context for your review.

When you sign up for a selling plan you are automatically enrolled in the the North America and Brazil Unified account which allows you ability to sell in US, Canada ,Mexico and Brazil.

Here is a 2 minute overview of the North America Unified Account for your review.

Additionally, this page has a lot of great resources including FAQ's on the account. Two of which are the below:

What if I don't want to sell on more than one store?

If you have been upgraded to a Unified Account and do not want to sell on another store, keep the store switcher on the country on which you originally registered. Your products will only list on that store.

I will echo @Seller_OvL8C4BJWiuS9above and still recommend setting those marketplaces on 'vacation mode' as well as ensuring you have no inventory in those locations.

What fees will I pay if I sell something using my Unified Account?

For all per-item transaction fees, you will pay the fees applicable to the store in which the item was sold. Your monthly Professional selling plan subscription fee will be allocated to each North American store in which you have active listings on your monthly billing day, and will be limited to USD 39.99 or its equivalent in total. For more information about Professional selling plan fees, go to Selling on Amazon Fee Schedule.

CR_Amazon