Have copied over a version of the invoice.twig file that drives our current OC3 invoice & it's working well on OC4 - but there's a glitch.
Have used Language Editor to change extension/opencart/total/sub_total to change the checkout text from "Sub-Total" to "Sub-Total (excluding VAT)" - hoped this would also change the same text on the invoice but it hasn't

What file do I need to edit / what do I need to add to the invoice.twig file to change the invoice sub total text as above? - cant find any other suitable place to edit on language editor or any other file that I can edit to make this change.
Ideally would also like to add "(excluding VAT)" after the name of the shipping method on the invoice but that's not essential
Please dont say dont use it / wait for 4.1!! - for reasons too complex for here, need to move forward on the OC4 site!
Thanks in advance