DECLARE @Table TABLE (FromDate DATETIME, ToDate DATETIME, ResultDate DATETIME)
INSERT INTO @Table VALUES
('2012-01-01','2012-03-31','2011-12-31'),
('2012-04-01','2012-06-30','2012-03-31'),
('2012-07-01','2012-09-30','2012-06-30'),
('2012-10-01','2012-12-31','2012-09-30')

SELECT
	ResultDate
FROM
	@Table
WHERE
	GETDATE() >= FromDate
	AND
	GETDATE() <= ToDate

declare @ThisDate datetime;
set @ThisDate = getdate();
select @ThisDate, dateadd(qq, datediff(qq, 0, @ThisDate), -1);
set @ThisDate = '20120507';
select @ThisDate, dateadd(qq, datediff(qq, 0, @ThisDate), -1);