The first step is to take Backup of your Data. For data backup go to START BUTTON-> OPTIONS-> DATA BACKUP
A Window will open you can select path of your backup file in that. In case if you want to save your current year financial year data backup in other path beside from the default path you can change the path and change the name of the file with the current year mentioned in the name and save it.
After this process go to START BUTTON-> OPTIONS-> CLOSE FINANCIAL YEAR
A window will open and you have to select "Select all" and "Change financial year for all users" and press ok Button.
A success massage will appear. Select ok to the option
Now you have to close the software and login again. Your financial year has successfully changed and you can now start your billing in the software.