a couple of things:

a) there are a couple of filters you could already use to adjust the output of the “detailed” report
namely ‘wppizza_filter_csv_columns_detailed’ – for the column labels and ‘wppizza_filter_csv_rows_detailed’ for the rows/values (see the WPPIZZA_FILTER_CSV_COLUMNS_DETAILED/WPPIZZA_FILTER_CSV_ROWS_DETAILED section here https://docs.wp-pizza.com/developers/?section=create-your-own-sales-report )
However, tweaking the output, although certainly doable, is not exactly trivial.
That said, I agree with you , that the breakdown of taxes could be done more elegantly , so I’ll look at that and if I don’t come across some unforeseen problems – alwasy a possibility of course – will add a more detailed breakdown soon (perhaps even in the next update of the wppizza plugin, though cannot 100% promise that at the moment

b) ignoring the above , the “detailed” export does of course already have that data included in the “order verbose” column (but as mentioned , this could/should all be broken down into it’s own columns, I agree)

So if you need this done immediately, use the filters I mentioned above – or indeed create your own sales report altogether as outlined here https://docs.wp-pizza.com/developers/?section=create-your-own-sales-report – otherwise perhaps you can wait for the next update or so and this tax data will perhaps be more manageable for your scenario

hope that helps