Hi Prateeksha,
Sorry mate, I did not understand well your inquiry..
So you have 2 objects? Sales Date and Start Date? Am I right?
If yest, just go to filter tab of bex query designer and filter the START DATE with this:
START DATE >= 2013
So that whatever SALES DATE were chosen by the user, whether 2011 or not, data having START DATE starting with 2013 should be only shown in the report..
Thank you!
Loed