Job Work invoicing

IF U R RUNNING AN EXCISEABLE UNIT SAY YOUR PRINCIPLE MANUFACTURER TO SUBMIT A DECLARATION UNDER NOTIFICATION NO. 214/86 AT YOUR DIVISION THAT HE WILL PAY THE DUTY ON FINAL PRODUCTS.

It is to be noted that there no duty liability on the part of the job worker only in case it is proved that there is no manufacture in the premises of the job worker. Excise liability will arise if goods are manufactured during the job work. As  correctly pointed out, notification no 214/86-CE will give clarity  on the subject. Also refer rule 2(n) of the Cenvat credit rules

You are a job party for that company and you will raise a Labour charge invoice to the company

In this case, you are a service provider, You should pay service tax only.  For that you can registered as a service provider then create invoice with service tax and file stax returns.