Multiple choice social science government and taxes types of tax types of taxes government budget and taxation Dematerialization of TDS certificates had been effective from _________. 1.4.2005 1.4.2008 1.4.2007 1.4.2006 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The dematerialization of TDS certificates was introduced to streamline the tax deduction process, and it became effective from April 1, 2008.