You can create a backup file (*.qbb) and restore it with another name as a dummy file (e.g dummy.qbw).

Thank you - we understand that part.  I'm looking for guidance on the best way to set up simulated payment receipts from customers, assigning to deposit accounts.  I know there are limits to practicing full ar/ap practices since this is in a sandbox.  But would like to get employees used to doing as much as possible with our particular company data (albeit several months old) in a safe environment.

we'll start with the article you linked.  Thank you.