The document provides an overview of income tax in India. It defines income tax, the assessment year and previous year periods. It outlines what constitutes taxable income and lists various income sources. The document also details the income tax slab rates for the 2021-22 financial year and various income tax deductions available under different sections. It describes the process for e-filing income tax returns online through the income tax portal by selecting the appropriate ITR form, filling in details, calculating tax payable, previewing, submitting and verifying the return.