OK, it shows Tax Amount, but not much help at the moment. 3 things I will comment:
If we use new feature there are no subtotals at the end, just one TOTAL.
As I understand and worked, checkbox Amounts are tax inclusive til this change, has nothing to do with real VAT calculations. This is how we used it. It depends how we like to choose to enter data (with or without tax) and according to TAX code chosen manager calculates real unit price. This doesn’t need to be changed because it will make changes to already entered documents. Maybe it will be better to have a new checkbox Show Tax Amount as Column (or similar).
Here is by our law how should one invoice look like (closest I managed to do with custom theme, calculations inside, and heavy customization and looping through tables exposed inside). I translated to English so you could get real feeling what have we asked for with @novica. Please Take a look at lines items, but also Totals section.
Preview Screen (Unit Price = E.M. My custom field for defining line item Unit Names)
Please feel free to comment, and I will also share with you the theme if needed so you could see what I was doing. Also When Invoice has only one VAT %, some fields are missing, so the whole thing is breaking apart, so I have 2 wersions of theme (for 1 VAT code, and for Multiple VAT codes). I am in the process of putting all in one theme with lots and lots of IF_THENs and Loops
Maybe the best will be if we have all amounts and columns exposed in custom forms (Unit Amount, Vat %, Vat Amount, Unit with VAT, Line Totals With and without Tax, etc…, Also totals with and without VAT per VAT Code, and then we can choose in custom theme what we want to show. That way maybe default themes can stay the same, and only users that need this kind of display with code custom themes as they like it. So the exposed data should be always the same (as much as possible), always same structure no matter how many VAT codes or line numbers invoice has, and users should build there invoice as they need. Also column order change now is very difficult (I have done it, but is not easy).
Maybe some invoice builder (visual or something like custom reports), just an idea, a long-shot one