Hi @Seller_hacrHWt4ewohz!

I think I can help explain what's happening with your marketplace access. Since you already have accounts in the US and Canada, you shouldn't need to add new stores separately - these marketplaces should be accessible through your existing account.

According to the Global Selling help page, if you sell on one North American marketplace (like Amazon.com), you can sell on other North American marketplaces from the same account. The help page specifically mentions this under "The exceptions are:" section.

Here's what you could try:

First, look for a store dropdown menu at the top right of your seller account where you should see options for US, Canada, and Mexico. If you don't see this dropdown, it might be because this feature is only available for Professional selling accounts, as mentioned in the North America Unified Account FAQ.

Another way to access your marketplaces is through the Sell Globally Dashboard: https://sellercentral.amazon.com/global-selling/dashboard/

One important thing to note - if you have separate accounts for each marketplace, these unfortunately can't be merged. The North America Unified Account FAQ clearly states "Existing accounts in each store cannot be merged. Each selling account will have its own, distinct Unified Account."

Hope this helps! Let me know if you need any clarification.

Best regards, Michael