Sage Simply Accounting is a software package designed to meet business accounting needs. You will enter most of your business information the first time you run Simply Accounting. However, the software does allow you to make certain changes to this information as needed, including altering your company’s fiscal year end date.
Create a backup of your Simply Accounting information and close any Simply Accounting windows you may have open.
Open the Simply Accounting home screen in single-user mode. Make sure that you are logged in as the system administrator or as another user with full accounting rights.
Access the “Set Up” drop-down menu at the top of the screen and select the “Settings,” “Company” and “Information” options.
Click on the “Calendar” button and choose your new fiscal year end date.
Save your changes and close the "Set Up" menu.