Canadian Taxes

Ok, here's the problems that i dont know how to deal with it.

in Canada we have the GST (TPS in French) that cover every sales at 5%. BUT each province has its own (except alberta... i think)

we need to cover the taxes of our province but only the gst outside ...

in Quebec, taxes are nightmare... one taxe taxes the other!
here how it work

taxable good at 100$
GST is 5% of 100$ so... 105%
T.V.Q. (Q.S.T) is at 7.5% of the already taxed good

so, 7.5% of 105$ (7,875$) == 112,875$

we have combine taxe of 12.875% where we should have a 12,5% flat taxe rate... how the hell should i do for it to work well ?

right now, i include the GST inside the price and apply only the TVQ...

is there a better way so all taxes appear in the bill?

If you have not already, have a look at this http://www.opencart.com/contribution/in ... tion_id/31 on zone based tax calculation.

I do not know for sure but tax on tax will probably require you to code a new calculation extension.

i've read this, very good..

but in my shop there is no calculate extension installed, were and how should i proceed to install thoses calculate extensions ?

In store Administration, from the menu Extensions->Calculate you should see a list of the calculate extensions. If the image on the right for any extension is a plus sign, you can click it to install the extension. If it is a minus sign, you can click it to uninstall. You can also edit them to enable/disable (important).

Play around with them on your test site and you will see the results of the various calculations appear on checkout pages etc.

How should i proceed from now on...

i've set up 2 Geo zone :
1- Canada for all zones
2- Canada / Quebec province

so there is 2 zone, 1 zone IS in the other (Quebec is in the 2 zones)

in the taxe class "taxable goods" i've setup 2 taxes rates.
1 for the Canada geo zone at 5%, and the other is for the Quebec geo zone @ 7.8750%. (a 5%+7.5% tax on tax = 12.875% flat rate)

taxes are OFF in the settings / locals

now it should be 5% for all zone in canada adding a 7.8750% taxe above it if your in Quebec.

how could i show all taxes ?

right now in the checkout it only show the cumulative taxes with the name of one taxe zone (in quebec it sais P.S.T. and the rest of canada g.s.t.)

is there a way to SHOW all taxes in single row at the checkout ?

like this :

Subtotal:  46,00$
Shipping: 0,00$
T.P.S. / G.S.T.: 2,30$
T.V.Q. / P.S.T.: 3,62$
Total: 51,92$

because right now it shows :

Subtotal:  46,00$
Shipping: 0,00$
T.V.Q. / P.S.T.: 5,92$
Total: 51,92$

Yes, I had a look at this and the tax calculation amalgamates the rates for multiple taxes and uses one of the titles. If you are a php coder, have a look at \catalog\extension\calculate\tax.php and modify it to get the list of taxes from the cart and calculate the taxes yourself. The forumulas you need are in library\cart.php

It is too big a job for me to do for fun as I am really busy with paid work at the moment (yay) but I am happy to help you with any questions.