CST to be different gl during GR

Dear All

My requirement is, CST JVCS condition value should be displayed with separate GL account. Currently it is includes in GR/IR clearing account only.

For eg

Stock Account 106 Rs

       GR/IR A/C  100 Rs

       CST (JVCS)   6 Rs

Please tell me how I can configur this?

Thanks in advance

Naru