Manufacturing of goods & export

Dear All,

I work for a textile firm at Tamilnadu. Our registered office is at Coimbatore. Recently we have installed a spinning unit at Dholka, Gujarat.

Now we are planning to export goods through in-house stuffing method from Factory. But in the Export invoice, our registered office address will be shown.

Do we need to prepare a tax invoice from Factory to Head Office or Can we account it as Branch transfer against Form F??