Just go to a branch to ask for cross-border banking service. Or you can check https://www.tdcanadatrust.com/products-services/banking/cross-border-banking/index.jsp
I opened such an account myself to accept some payments from US vendor. I previously use PayPal but Paypal starts to charge fee even with deposit, and I cannot transfer US$ fund from Paypal to my Canadian-based US$ check account, so I stopped with Paypal.