Start a New Fiscal Year—Define Your New Fiscal Year windowSelect whether you want to use 12 or 13 periods in the new fiscal year. The thirteenth period is used by accountants to record accounting entries (such as depreciation adjustments) that don’t relate to a specific month, but which need to be incorporated in the full year’s reports.Note that if you had 13 periods in the year that you are closing, and you recorded transactions in the 13th period, you cannot select 12.