Can we use 1 TAN for centralized transactions

Hi,

Can we use 1 TAN for centralized transactions?? or we need to get TAN for different different states/ locations?? all the Invoices are processing from Mumbai HO only but services we are taking at many states..

eg - We are selling scrap at GOA factory & collecting TCS on the same & making TCS payment to the Government using Mumbai TAN as our HO is at mumbai. ( We dont hv other location TAN).

Kindly advise.

Rohit