Please be a bit more descriptive.
When you say a quarter, is that to say that the report starts with the current month, and you'd like to see future months?
If so, you've some bad news forthcoming, though there are tricks to help.
If you're just trying to view several months of data, set your selection criteria to equal whatever months you'd like, as in.
if month(currentdate) = 3 then
{yourdatefield} > date(1,1,year(currentdate)
else
if...
Don't take this as the actual syntax, I'm just describing one method, and I've too many languages in this fuzzy ole noggin to do that well.
Also, companies have different quarters, so if this is intended for other audiences, keep that in mind.
As an aside, if you can build a period table (containing year, quarter, month, week, day), you'll simplify this type of thing immensely, offload the rule from your report (always a plus!+!, and all for many future things in life.
-k
kai@informeddatadecisions.com