The document provides instructions and guidelines for preparing quarterly electronic Tax Deducted at Source (eTDS) data in India for the assessment year 2009-2010. It includes an overview of the key systems involved like OLTAS and ERACS. It discusses the sections under which TDS is charged, why eTDS is necessary, the phases of implementation and furnishing eTDS returns through the TIN Facilitation Centers. It also provides details on the file formats, sections covered, websites for software and steps for data preparation using the Return Preparation Utility.