Change in tan or new tan

No need for new TAN no.

Its only that you need to report for anything required in old TDS office

Change of address within a jurisdiction does not change the TAN. However, it may involve a change in the Assessing Officer. Such changes must, therefore, be intimated to ITD so that the TAN database of ITD can be updated. In case of change of address from one jurisdiction to other (e.g. address changes from Bangalore to Mumbai) a new TAN needs to be applied for and previous TAN needs to be surrendered on allotment of fresh TAN.