The Generate Periods form is a tool to help you build your fiscal year periods. In the left area of the form you will see the Fiscal Year, Start Date and End Date read-only fields, and information shown on these fields take its values from the fiscal year where the Generate Periods form is opened.
In the Auto Generate Periods area, you can choose from a list of pre-defined periods, such as Quarterly, Monthly or Weekly. Click OK to auto-generate periods. This will then add your fiscal year periods in the Fiscal Year Periods form grid area.