Prestashop 1.7 calculates tax in wrong way

[M. Rahi]

In prestashop 1.7, the tax is calculated in the wrong way. May not only me is suffering from this issue but others also. In this version tax is calculated per unit price then it rounded it to 2 decimal places. And then it is multiplied by the quantity ordered to get the total tax. But I need to round it at total. That means it won't round at unit tax price. I tried to change rounding configuration from General Settings at back office but it didn't help me. Where exactly the code in the core that calculates tax and round it? I checked classes/cart.php, classes/cartrule.php and several other files but it also didn't help me.