In India the tax system is changing from July this year. And the requirements for a legally accepted invoice is changed. Even though the invoice layout can be customized, there will be some complications regarding the new invoice format that is needed.
A lot of customization will be necessary from the user side regarding the number of columns and their content. It shall be a great help for the Indian users if you could come up with an update regarding this.
I shall try to update you with any latest info available regarding this from time to time.
NOTE: The same shall be applicable to purchase invoices too.
As per latest update received,
The invoice shall be prepared in triplicate, in case of supply of goods, in the following manner:
the original copy being marked as ORIGINAL FOR RECIPIENT;
the duplicate copy being marked as DUPLICATE FOR TRANSPORTER; and
the triplicate copy being marked as TRIPLICATE FOR SUPPLIER. **
Please follow the link for complete details.