To change your address on your TurboTax Online tax return, select Info > Contact Information from the left side menu.
To change the name on your TurboTax account, login, open a return and then select "Account Settings" from the bottom of the black left side menu. This will open another page for the Intuit Account Manager. There select "Personal Info", then click on "Address" and you will be able to change your address.
You should also let the Canada Revenue Agency (CRA) know that your address is changing by using their My Account service or by calling them at 1-800-959-8281.