Income-Tax Returns: The presumptive taxation scheme simplifies I-T compliance for small businesses, professionals, and freelancers by allowing them to declare income as a fixed percentage of turnover without maintaining detailed books of accounts. Income-Tax Returns: The presumptive taxation scheme simplifies I-T compliance for small businesses, professionals, and freelancers by allowing them to declare income as a fixed percentage of turnover without maintaining detailed books of accounts. by Soban News (international And National News)