Where is the best place to put notifications?

Our app currently has a Notification Center that can be accessed through an icon on the upper-right hand corner of the page.

I'm in the process of designing a Dashboard, which it and of itself will have its own notifications - eg: failed renewals, expired plans, etc.

But now, I am torn - do I put these notifications within the Dashboard itself (as some sort of banner)? Or will they go into the Notifications Center? The issue with the Notification Center though is it's a slide-out panel, so in that way, it can be ignored and doesn't suggest urgency.