Did you know that CRA has an app which you can download and set-up to remind you of your due dates for your business?
You can set it up to remind you when your GST, Source Deductions, Corporate Tax, etc are due and it will push a reminder so that you don’t forget.
http://www.cra-arc.gc.ca/mobileapps/
You can access the download on the CRA website at the address above or search CRA in the app store. The app is called CRA Business Tax Reminders.