@Seller_XCoDTCAtkEQQW

My name is CR and wanted to hop in here to provide you with some assistance. Please know the seller forums are not a direct path to Seller Support and we don't have the same tools or visibility into your account that they have.

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.

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.

You can downgrade your account to the Individual selling plan by following the steps outlined on this Help page.