Can i issue retail invoice

Lalit (Sr. Systems Analyst) (26 Points)

20 March 2013  

I am a dealer of Pesticides and have TIN Number from Orissa (Odisha) state. Recently I decided to expand my business and deal with tractor spare parts. I am yet to apply for amendmends for VAT category. I have already purchased some spare parts from a out of state supplier without any bill/invoice. How can I sell those spare parts with bill? I have heard that, it is possible to do so by depositing/paying tax on the current stock (that I have purchased without a proper bill/invoice). 

Kindly guide me in this and suggest solutions.