In order to pay the CRA for your tax balance owing, you will need to arrange payment with the CRA. The most simple way of doing so is via your CRA My Account if it is set up. More information on paying your balance with the CRA is available at https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/making-payments-individuals/paying-your-2016-taxes-owing.html
Please be sure to pay your balance by the filing deadline in order to avoid interest charges and penalties