Dear Sir,
Yes, it is taxable.
It should be shown under the head income from business.
However, the rebate under section 87A of Income tax Act 1961, which is available since assessment year 2014-15 is raised to Rs 12,500 from existing Rs.2,500.
The amount of rebate is 100% of income tax payable on the total taxable income of up to Rs 5 lakh. A rebate is the amount of tax the tax payer is not liable to pay. Total taxable income or net taxable income is the income after taking into account deductions.
If you are earning taxable annual income up to Rs 5 lakh will get full tax rebate and therefore you will not be required to pay any income tax for FY2019-20.