TAX calculation is wrong for italian fiscal law

[Guido B. <gd...@le...>]

In Italy the TAX calculation is made on total of the same TAX, list of
articles.
In SQL-LEGDER the TAX calculation is made on single detail row.

   Value        TAX 20%
    56,85       11,37
    56,82       11,36
    56,82       11,36
   ------------------
   170,49       34,09

If you calculate the 20% of 170,49 the result is different for 1/100 Eur

   170,49*0,2 = 34,10

=====================================================
This different value is wrong for italian fiscal law.
=====================================================

Is this a problem in another Country ?

I like to correct the problem but if the method of calculation is
different for every Country is necessary to define this with parameter in
the config file.
Please talk me coordination to correct development or your refusal,
please.

best regards

   Guido Brugnara