I'm working as a consultant teacher with a school. Apart from TDS deduction of 10 percent on consultancy fees, I pay 15 percent service tax. So far I have been filing ITR4. From AY 2017-18 Section 44 ADA is introduced for professionals having gross receipts of less than 50 lakh per annum. Am I eligible under this presumptive taxation scheme where I can claim 50 percent expenditure on gross receipts without maintaining any books of accounts? Can I file ITR 4S instead of ITR4 this year?