Here are the steps to customize taskbar notifications on your laptop:

1. Go to Settings > System > Notifications & actions.
2. Under Notifications, you can change whether to see notifications on the lock screen, and whether to see notifications when you're duplicating your screen.
3. Under Show notifications from these apps, turn on or off the apps you want to show notifications for.
4. Under App notifications, you can pick and choose which notifications you'd like to receive.
5. You can also adjust individual app sound levels.