You can amend revenue for historic days in the report by clicking on the pen next to the date.
A reason for editing could be that revenue was registered on a wrong day in PMS or POS. To get correct historical data you may remove that revenue from one day and add it to another day. You may also use this function when entering data manually, i.e if you are without integration to a PMS system. Click on the below link for more detailed instructions.
Click here to read more about editing in the Flash report.