17:48 UTC - The Avalara status page now shows that all systems are operational and that the issue has been resolved.
16:58 UTC - The Avalara service has posted that they are currently experiencing degraded service on their status page: https://status.avalara.com. If your web store uses Avalara for tax calculation, you may experience a disruption to this functionality. We are monitoring their status page and will post an update here when they announce it is resolved. Thank you for your patience and understanding.