Hello Pratibha,
I don't think, that the exit SLLLEG01 will work as you want. Has you implemented the BAdi I mentioned? Please do it I have done it and here are my result: I create an order and the system
stops at my break point
This is the Debugger view and here you can look at the local structures
and here you find the additional fields that can be filled by some coding...
By the way, if you look at your order in GTS the tab for the additional data is
I have debugged the "creation" of an order and pit some data in the additional field an the result is
I hope you get an idea of how it might be done.
Regrads,
Thomas