The orders total sales tax is already listed and displayed above in the order's Additional Information.
Generally speaking that is what merchants here expect but I can understand your point.
But turning "display: none" doesn't change the Price column under Product list:
However, doing some math the "VAT" is using the order's sales tax % (which is pulled from TaxCloud in this case) so it is correct. For now, I think it is better to change " "+$#.## of VAT" to read "+$#.## tax" and to be consistent change the VAT language constant to "Tax" as well.
However I found if I edit a individual product entry on an Order and change its unit price or tax values, it doesn't update the order's total sales tax correctly.
It removed the item's sales tax completely from the order's total sales tax (and is only charging tax on the shipping after the edit).
That seems more of a bug than anything however and a bit of separate issue.
Side Comment: VAT and US sale tax do not follow the same logic/rules. Our tax system is wildly inconstant and varies by state, city and county. Some states charge based on location of the merchant, others on the customer shipping address. Some states will charge sales tax on shipping, others do not. It is a bloody mess to be honest.
That's why something like TaxCloud really helps.
PS: I already did set everything to No on VAT and zero but the TaxCloud plugin from my understanding by-passes most of that any ways.