How To Add Amazon One Link
From your dashboard, click on appearance and then editor.
This will bring up all the coding for your website.
Over on the right, scroll down until you find THEME FOOTER (footer.php.)
Click on that and you will see the code.
Scroll all the way down to the bottom and find the closing body tag </body>.
Place your cursor right after the the closing body tag </body> and press enter. This will drop your cursor down one line in the code to make space for your new Amazon One Link code snippet.
If you didn't copy your new Amazon One Link code earlier, go and grab it now.
Paste the Amazon One Link code in the created space, right after the body tag.
Don't forget to hit the UPDATE/SAVE BUTTON.
Amazon will now be able to redirect your Canada and UK visitors to the proper storefront when they click your affiliate links. :)