add a notes field in the submission history page
While in the submission history, or at the input level, it would be helpful, if you could put notes or a reason. For example, I deleted transaction No.9xxxx because it was a duplicate of 9xxxx.

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Tami Klufas commented
Keeping the document history for ALL users here would also be beneficial. If I can see that I deleted something and that before that it was rejected for a reason, that would greatly assist in audit functions and ensuring that processes are being followed. Currently if my accounting staff is importing and deleting I miss all the steps in between completed by other users and the submission history just shows accounting importing and deleting an item with no explanation as to why.