Discount on supply section 15(3)

Vijay Boliya (54 Points)

26 November 2018  
Under clause (b) of section 15(3) discount after supply.
first *condition discount term specified in agreement and
second *conditions recipient reversed the credit (ITC) on discount.

my question is what about supplier, can supplier get the refunds of tax paid on discount? because supplier not received the full amount. And supply was already completed and he pay the tax on it.
also we can say that NO ITC NO TAX and vice versa.