Automatic J1IIN Creation

Hi,

I have one excise group and have marked ticked for automatic excise generation J1IIN once VF01 is saved.Now in one case I want to do the manual J1IIN creation.i.e while creation of Exports VF01,I would like to do the J1IIN manually.But in other scenarios I would like to have automatic J1IIN creation.

Can anyone plz guide me how to do this??

Regards

Somnath