Amending the opening date will depend on if you have access to the utility. If you do require this option, please speak to your Head Office. The stock result open date can be amended by logging onto Epos Manger and following the below:
Click System Maintenance and select Utilities.
Click Rollback Completed Data.
Choose your location and tick Set Stock Open Date.
Choose the relevant category and stock level.
You will now be able to set the opening stock date.
Please use with extreme caution and if you are unsure, please contact Support and raise a new case.