Problem with tax calculated after discount.

[relic]

Please forgive me, I'm quite new at all of this. I have most of my shop ready and I'm anxious to launch it but I'm hung up on one issue atm.

Here's my situation:
I only charge sales tax in the state I reside in. I have everything set in my state to calculate sales tax only and all products are set as "no tax". If I decide to put an item on sale for say, $5 off, the total is calculated at the pre-sale tax instead of the final cost + tax.

For example:
Original Price: $15.00 (15.90 with 6% tax)
Sales Price: $10.00 (should be $10.60 with 6% tax)
My cart is showing $10.90.

Am I missing a step or is this a bug?

Also, I know this has been discussed thoroughly but I must add my voice to it - PLEASE develop a final cart with a separate area for the sales tax. American customers are accustomed to seeing tax only when they are checking out. I haven't checked but I would imagine that there may be some state laws that demand that the tax show up separately.

Thanks in advance for any help provided!

[relic]

No one has experienced this??

[demsd]

I don't think tax works properly either.

One of my products:
$15.00 with 7% tax should be $16.05 but cart is showing $16.40. The only way I could get the price to show properly is to set the tax rate to 5.25%.

Can someone look at this please?

[demsd]

No one??

[tulkastaldo]

I realize I'm late to the party, but I'm also having this problem, as should everyone using prestashop who hasn't modified the code.

I've looked into the underlying code and it seems there's no easy way to get around the problem. There's a fundamental flaw from a logic/implementation level I'm not entirely sure how easy it would be to correct it. The problem basically stems from the displays being created via Javascript which creates variables for the discount and price. When it pulls the "price" value (using the products class, function: getPriceWithoutReduct()) it automatically includes any applicable taxes. So you end up with a "price" which already includes the tax and then a discount, two separate values that are then combined for the "final" price. Even in the latest svn release this issue persists. The problem is final price is handled in different areas of code and is so ingrained in the methodology of the system I'm not sure if it can be corrected without significant retooling.

Personally I would prefer having a Tax section in the cart just above the shipping cost like most carts and not bother with including the tax in the displays anyway. As it stands if you live in one of the taxable zones and are signed in you have no idea what you're paying in taxes without pulling out a calculator. It also distorts the marketing effort of using .9X so the illusion of not paying $10 but $9.99 is lost when tax is automatically applied for you. At the very least there should be an option to enable the combined price or calculate tax strictly at checkout.

I have enabled the "Display pre-tax price on product page:" setting as detailed in http://www.prestashop.com/bug_tracker/view/1356/ with no effect.

see also feature requests:
http://www.prestashop.com/bug_tracker/view/1714/
http://www.prestashop.com/bug_tracker/view/1598/
http://www.prestashop.com/bug_tracker/view/457/
http://www.prestashop.com/bug_tracker/view/203/
http://www.prestashop.com/bug_tracker/view/197/