The document describes how to use ClearTax GST Offline, a no-internet billing software for GST compliance in India. It allows users to create invoices in Excel and then export and upload them to ClearTax GST to file returns. Key features include creating free invoices offline, exporting and uploading invoices to file returns with one click, and storing invoices on the computer with or without internet access. The document provides step-by-step instructions on setting up the software, creating and managing invoices, and exporting data to ClearTax GST online software to file returns.