Windows

1.  On Windows 10, click the Start menu at the bottom right of your taskbar
2.  Go to Settings -> System
3.  Find and click Notifications and Actions, located on your left sidebar
4.  Under Get Notifications from these senders, find Taskade and make sure notifications are turned on 

Mac

1. Go to System Preferences -> Notifications
2. Find Taskade and turn your notifications on

iOS

1. Go to Settings -> Notifications 
2. Find Taskade in the list of applications and make sure notifications are turned on

Android

1. Go to Settings -> Notifications
2. Find Taskade and make sure notifications are turned on