We are providing services related to Travel to our customers, Below is the whole process-

1) Our Customer ask us for particular service which may relate to Airline Ticket, Taxi, Visa etc,

2) We check the price and buy the ticket directly from Airline and add margin and sell it to customer.

3) We have credit in airline and made payment in bulk in 15 days or so and record this whole amount in expense

4) As we have multiple airlines which we made payment but we record the expense in whole 1 lot like we made payment of 4 Lakhs (Expense) and purchase the 20 tickets in 15 days period of 4 Lakhs.

5) We create individual invoices for customers for each ticket and add service charge and service tax.

My question is how can we track the invoice through expense and attach it to Invoice and what can be standard way to deal this, Please suggest.

Travel Services