Date created and the ability to reconcile tax reports

My preference is via two separate features. Firstly a simple way of knowing if the figures have changed since a document was sent out

Secondly history search options
Both on the history tab enabling finding changes made after a certain date (eg your lock date or the date a report was sent to a tax authority) to transactions dated before a certain date (eg the end of a financial period). Hopefully this is what Lubos was alluding to here

And history at transaction level