Create a number parameter called Quarter with min and max values of 1 and 4.
Create a formula field from your date field as Quarter:
Datepart("q", {table.datefield})
Point your parameter to = this formula
In your select statement add in a way to minimize the date range to a the last year for all data:
datediff("d", {table.datefield},currentdate)<365
Keep in mind that this may throw something off because you will possible have items that are say first Quarter last year and first Q this year which will be both indicated as first quarter and get pulled into the report.
Or give me the definition of what you mean for by only wanting this for the current year and I may be able to help clean up the above statement to work better for that.
You will have to decide how you want to cut your data off to avoid this or include a year int he values somehow to avoid it.
Hope this helps as a start.
Edited by DBlank - 13 Mar 2009 at 2:13pm