How much Income Tax Are We Paying?

Income tax calculation through New Regime

During the last months of every financial year, there is a tradition, a custom to keep ourselves sane - ranting on tax that we suffered through the year, and any returns we can expect from the taxmen. In one of the ranting sessions, we had an interesting conversation. How much tax are we paying?. What is so interesting? The tax must be either 25% (new regime) or 30% (old regime).