= /Expenses:Transportation/ and not expr "has_tag(/NOTAX/)"
         Expenses:Tax                     0.2
         $account                        -0.2

2020-05-06 * Test
    Expenses:Transportation            200.00 EUR
    Assets:Bank                       -200.00 EUR

test bal
         -200.00 EUR  Assets:Bank
          200.00 EUR  Expenses
           40.00 EUR    Tax
          160.00 EUR    Transportation
--------------------
                   0
end test