If you are wanting to connect your DHL Express account with ShipStation, you must have an active DHL Express account. If you are needing to open a new DHL Express account, you can start the setup process here.
Now that your DHL Express account is setup, let's get it connected to ShipStation!
Head to your Account Settings (the gear icon in the upper right).
Next, select Shipping and then Carriers & Fulfillment from the sidebar on the left.
On the popup that appears, select DHL and click Connect.
On the next page, fill in your DHL Express Canada account number.
Click Connect and your DHL account will be linked!