Go to Navigator Bar to find & click Settings> Manage Fiscal Year.
You can start manage your fiscal year. You can create the new fiscal year.
Important : You need to check the "First Fiscal Year" correctly because it will affect second fiscal year.
Example : When you create new precious fiscal year. New fiscal year couldn't edit the end date because it need to link will the next fiscal year.
If you want to edit the fiscal year, you click the edit button then you can edit the date & name. Finish the edit click submit button to save the update information.