For QuickBooks Online customers, all changes to your QBO data is automatically saved to your Vault in real-time!
In addition to that, as an extra precaution, your entire account will be automatically backed up each night at 12am local time. You can also perform a manual account backup at any time, if desired.
In terms of how we track and backup your data:
Rewind records the state of every resource in the system as it changes incrementally, without using the transaction log.
How this would be treated if a rewind/restore is needed:
If you were to reverse the deletion of a transaction, for example, we would rewind/restore it to the deleted state (if that’s the time you wanted it restored to).
As we've got snapshots of your accounts every time we perform a backup, even if you were to perform a rewind back to a certain date, we'd still have the information backed up from beyond that date in case we needed to recover it.
If ever you need to perform a rewind of your QuickBooks Online data, please refer to this How-To article.