YTD in the report

Hi

I have some KF's in my report .

1) When user enter the<b> "month"</b> in the selection paramter then he should get those KF's for that current month .

2) And he also wants those KF's values from <b>"Starting Month Of that Year to Current Month(YTD)"</b>.

so how can i get the YTD for those KF's in my report. please let me know

kumar