You need to renew Tally Software Service (TSS) on its expiry, to continue to avail all product upgrades and features.
TSS details are displayed in the License & Services block of the Information Panel . These details appear in red, fifteen days prior to the expiry of TSS.
You can get product updates, statutory updates, banking services, remote access to data, data synchronization, and remote user creation and maintenance services with a valid TSS.
Tally Software Services (TSS) is a software subscription for a collection of services which add great value to your Tally.ERP 9 by giving you the latest developments in technology and statutory laws. Continuous product upgrades and Updates, connectivity driven functionalities such as online data exchange between your branches, remote access, seamless banking and payment services and much more, enhance your business performance by leaps and bounds.