Tds on amc bill

We want to whether below transaction is need to be deduct the TDS.

We have received service bill of Rs 26000+4680GST 18%) =30680. Do we need to deduct the TDS as the payment will fall under more than 30K single payment. Our confusion is while deducting the TDS we need not to considered GST amount as it was on the service charges (Kindly quote the Section for GST on service is not considered while deducting the TDS).