Credit note received

Dear all,

This is regarding one credit note we received from our vendor. they have issued the credit note to us against some incentives. and the credit note amount they have adjusted against the payment which we have to pay to our vendor.
the credit note they issued with out any GST.

last year we have jv and adjusted the same and this incentives will go to indirect income.
but now as GST is inline, I m bit confused how to pass the entry in tally.
kindly suggest me how to do this.