Hi Rory,
You are correct that there are Calendar date ranges defined in Quik Reports for Windows, but no Fiscal date ranges. You will need to custom design some formulas to create the fiscal quarters (such as: if Month(date) in 2 to 4 and Year(date)=2000 then amount else 0 for a fiscal quarter from Feb to Apr 2000).
Unfortuneately, the help text is incorrect and should read 'calendar year' instead of 'fiscal year'.