Adding a line item in Invoice

Dear Expert

Greetings!

We have a requirement from our customer, as mentioned below.

Requirement,

-> Add new line item in the invoice for the customers with the transportation cost per invoice created on the day.

    The New line item is required as they charge 23% tax for the transportation cost (service material).

I am thinking of user exit in include LV60AB03.

Please let me know, if any other work around possible to reduce manual effort.

Please note, there can be multiple sales order combined in one invoice.

regards

Praveen