State basis VAT registration No.

Hi every body

In my scenarion my company provide material and services to entire country, each state they have offices and each state they are registered with TIN/VAT no.

Now my question is should i need to maintain all state as Sales organistion because in the invoice we need to maintain state wise VAT/TIN no cause sales is based on that state. or can i maintain VAT/TIN no based on sales office basis also instead of maintaining so many sales organistion.

Regards

Shambhu