This book comprises the law as amended upto Finance Act, 2016 and cases reported upto 31st March, 2016. Power of granting immunity from penalty of prosecution has been vested in the commissioner if a proson after abatemen of settlement proceedings under section 245HA applies to him and satisfies him of true and correct disclosure and cooperation. The law of Prosecution under both Income Tax and Wealth Tax Acts has been discssed in depth along with relevant provisions of indian penal code, 1860 and criminal procedure code, 1973 substantiated by recent case law.