This would be possible only using custom HTML theme at the moment. Eventually it would be great if you could control where columns should be injected without resorting to custom HTML themes.
I will be using a custom theme anyway to put some brand colours on my quotes/invoices, so I can change that as well. No biggie. But ultimately would be nice to use Manager to re-arrange the columns.
quickbook does able to place it’s custom field in invoice template. but not extensive like manager however requires extensive programming language as well. ahahah