Task 3: Back up your company file
Before you start a new payroll year, make a backup of your company file. Once the previous year is closed, detailed payroll information is no longer available and T4 and RL-1 Summary’s cannot be printed for that year.
When you create the backup, name it with the year in the file name, for example payroll2011. This file, when restored will be used to T4 and RL-1 Summary forms and reports for that year.