Income tax rebate and employee profession tax deduction

When is rebate on IT is applicable? For A.Y 2019-20.
Under Section 87A.........For an Individual assessee, whose total income does not exceed three hundred fifty thousand rupees, shall be entitled to a deduction, from the amount of income-tax, of an amount equal to hundred per cent of such income-tax or an amount of [two thousand and five hundred] rupees, whichever is less.

Where do we need to show the deduction made by the employer monthly basis?
B1(v)........Deduction u/s. 16

Thnk you Sir Dhirajlal Rambhia for clear explanation.