Hi Ernst,

There is not an obvious way to do this with how the Invoices are set up right now; however, it is in our developers queue of things to look into.

We will let you know as soon as we have an update!

If you would like to be provided with a quote for our programmers to add the invoice tokens you requested, please submit a Quote Request at the following link - http://www.smith-consulting.com/services/requestaquote.aspx

Thanks!