debit note against rejection

debit note against rejection

Hello,

I am very new to ZOHO and would like to get and understanding on the usage of ZOHO books/invoice in the following scenario:

-- I make a sale of 6000 + 2% Tax, and I get a full payment against it.

-- Now after 6 months the customer raises a rejection debit note of 4000 (because there was rejection on products worth Rs. 2000).

-- How do I make an entry of 4000 in ZOHO and How to update the Tax implications, since now the actual sale is only 2000 (6000-2000).

Thanks.

PC