- In the Home window 
 on the Maintenance menu, choose Clear Data, 
 and then select Automatically Clear Data.
 
                - Select the check 
 box next to the data you want Sage Simply Accounting to clear automatically.
 
                - For each data type 
 selected, specify how old the data must be before the program can clear 
 it at your year-end. You can keep most data for up to 999 months.
 
                Note: Only fully-paid customer and vendor transaction data will be cleared at year end. Transactions that are only paid in part will not cleared.
                - Click OK.