Taxes issues - again

hello,

i ran into some taxes issues :

for quebec indeed...
there is a french-written post on prestashop forum :
http://www.prestashop.com/forums/viewthread/14585/P0/discussion_generale...

with some explanation... (sorry for english only !)

example :
quebec site selling to international : 0% taxes
same site selling to ontario & western provinces : TPS (5%) tax only
same site selling to maritime provinces : TVH (13%) tax only
same site selling to quebec province : TPS (5%) -then- TVQ (7.5%)
the TVQ adds itself to the majored subtotal of the TPS.
(this is a 7.875% tax as it adds itself to the 5% of the TPS already perceived.)

in the same ideas order, this is illegal in canada to simply display total with taxes included.
for example in quebec you mandatory should display the details like this :
Total before taxes: 10,00$
TPS: 0,50$ (5% of 10$) <- included between parenthesis
TVQ: 0,79$ (7.5% of 10,50$) <- same
Total: 11,29$

this is mandatory by law to display the account numbers of TPS and TVQ on the bill as merchants, too.

europe and usa, as many other countries, have only a one-tax (VAT and so on) system, but a few countries (or provinces) like quebec indeed have this two or three tax to take into account following the country (or the country's province) they're sending the bills to...

could it be possible to have a generic tax-process so that it could be taken into account please ?
like tax profiles following the country/country province sending to ?

i don't know how magento deals with this however but for sending from this province (quebec) to both international, quebec, other canada's provinces this is really a pain in the ass :)