Out of scope Transaction with tax transaction in one invoice

Out of scope Transaction with tax transaction in one invoice

Dear Zoho Team, 

Kindly enable to create out of scope transaction with tax, transaction in one invoice 

Most useful for commission agent 

For example 

Air Ticket Rs. 5000/- Out of scope 
Service charge 500/- + 18% GST = 590 
Total 5590 

Currently I have created 2 transactions each invoice 

Please check Quickbook invoice sample