BakerHostetler’s Data Privacy Monitor has a write-up on the changes in HHS/OCR’s data breach tool and online submission of breaches.
The team is working on both sites, and I’ve reported a bug to them with a request for certain features, but as Data Privacy Monitor notes, the breach submission form now requires more specific information/break down of the breach and the covered entity’s response to the breach. Be prepared to answer questions that you would not have been asked under the old submission system.