Hi please advice

I have a situation.   

1. I have HDFC bank account

2. I have a customer who has done inward remittance for purcahses from overseas.

3. HDFC is showing Value of Service say $100 and GST @ 18%.

4. Value of Service is not charged. But  CGST 9%    ( $ 9) and SGST 9% ($ 9) is charged.

Question

How should I record the CGST and SGST amount in Zoho Books.  Kindly advice at the earliest.