Excise Invoice number in MB_MIGO_BADI

Hello masters...

I am working on badi MB_MIGO_BADI.

Whenever line item in MIGO is marked as 'OK' and Enter is pressed,

Excise Invoice tab gets appeared.

I wan to crosscheck if this invoice number is assigned by user or not with respect to Tax Code in PO item...

I debugged and checked almost all internal tables in MB_MIGO_BADI, but was unable to find Excise Invoice number and Excise Invoice date..

Please help...

Best Regards

Yogi