Income Tax Calculator for A.Y.2018-19 & A.Y.2019-20. This calculator is very quick to calculate income tax for A.Y. 2019-20 and A.Y. 2018-19. Just select assessment year, choose age and enter income. You can reset and recalculate income tax unlimited times.Http iframes are not shown in https pages in many major browsers. Please read this post for details.