Download Income Tax Calculator FY 2020-21 (AY 2021-22) in Excel Format. This calculator is designed to work with both old and new tax slab rates released in the budget 2020. You can calculate your tax liabilities as per old and new tax slab. It will help you to make an informed decision to opt for a suitable tax structure. Income Tax calculation is one of the complex tasks for the taxpayer. To help taxpayers here is a simple excel based Income Tax Calculator for the financial year 2020-21 (AY 2021-22). The calculator is made using simple excel formulas and functions.