Income tax rates and withholding obligations govern taxpayer classes, source-specific deductions, surcharges and agricultural income computation. The schedule establishes tiered income-tax rates by taxpayer class and age, source-specific withholding rates for residents and non-residents (including transitional variations tied to agreement dates), surcharge rules for companies above a threshold, adjusted rates for salary tax charging and advance tax computation, and comprehensive rules for computing net agricultural income including applicable heads, special percentage treatments for certain crops, loss set-off across specified years, succession limits and Assessing Officer powers.