You may have opened up an American account at some point, without realizing you were on the American side; for that reason, you would be receiving US emails.
Please click on the link provided and contact them in the US to have yourself removed off their mailing list.
Here is the link - on the left side of the page you have Facebook or Twitter links you can click on to speak with someone through their social media pages.
Footnote: Remember to check and make sure you are on the Canadian side of TurboTax, which means you would be here in Canada (.ca) instead of here in USA (.com)
I am suddenly getting emails from the American TurboTax people. It appears that I am no longer getting Canadian information. I tried to get information on changing this, but had a lot of trouble. When you get on to the website, it gives a couple of tax experts to talk with. As soon as you select one, you are immediately transferred to the American support site. There does not appear to be anyway to actually contact anyone on the Canadian information. The phone number is for American support. After a bunch of questions, they finally gave me the Canadian support phone number.... [phone number removed]. This is a new thing. All the years I have been using TurboTax (back from when it was QuickTax), never had a problem like this.