The document outlines the steps to enable SMS functionality in Tally.ERP 9 which includes: 1) registering mobile numbers in the control center, 2) enabling SMS access in Tally.NET features, 3) authorizing users for remote and SMS access, and 4) connecting the company to Tally.NET. It also provides instructions for sending SMS messages to the service number with a unique suffix to receive information from Tally.