Any guidance much appreciated.
you use the latest OC Release, and for this version, not much yet exists.
So, if you are unable to modify the existing INVOICE Layout, to match your Needs,
you'll have to get it custom made.
https://www.opencart.com/index.php?rout ... el%20maker
I'm rarely active at the OC Forum lately. To reach me, contact: email@example.com
A Demoversion of my free OpenCart LIGHT v.18.104.22.168 Software Edition
can be seen in real Action here: http://www.jti.li/shop/
1'300+ FREE OC Extension-Repositories - from OC v.1.5.x up,
on the world's largest OC-related Github Site: https://github.com/IP-CAM