Excise invoice in gold jewellery

Excise has its own format of Invoice, better to maintain that for small assessses, which should be enclosed with the vat invoice as proof of excise payment , Before taking in use , the assesee has to intimate the department the Serial numbers of invoice book to be taken in use such as 001 to 100, through ACES portal, in case of cancellation of any invoice due to any mistake , the assesee has to submit the rejected copy of invoice to department under a covering letter. 

Excise is charged 1st, then after adding the basic value + excise , vat is charged 

if your invoicing system contains the data prescribed in Excise invoice, then a common invoice can be maintained, however the assesee has to intimate the department regarding their invoicing system applied. 

Thanks a lot sir.