Magento – Discount price applied but not deducting from TAX summary

I have run into a similar situation in the past. The way I have resolved this was by overriding the totals block on cart and checkout and calculating + displaying my own values.

Well, finally it was really easy... But in fact I have lost almost one week searching the issue of this problem.

It seems that even if you will precise the tax %, in the tax rules, and you will chose tax class "Normal", the same for the product, it will not add tax to your product. It will without tax.

You have to choose tax class Shipping, for tax rule and product. And after that all works like a charm.