Right after the residential status assessment, an annual income of a person has to be determined and categorized. In this way, one can determine his/her payable tax amount. These heads are Income from Salary, Income from House property, Interest on securities, Income from business or profession, Agricultural Income, Capital Gain Income, and Income from other sources. For each head, he needs to submit specific documents as evidence of the income shown in the return.If any individual pays any amount of his income to a recommended govt. source, it will be entitled as a tax credit. Nevertheless, the payment must include necessary documental proves to keep it legit.