Need a custom module/plugin for OpenCart

Hello,

I need a module / plugin or help from an OpenCart expert with a problem regarding the tax calculation inside shopping cart. Mainly, i want to add the tax after the shipping method is selected. More details below:

Let’s say i have a product which costs $125. Here is what i have in the cart:

Sub-Total: $125.00
Sales Tax (6%): $7.50
Total: $132.50

Now, once i choose the shipping method, i have this:

Sub-Total: $125.00
Shipping: $12.00
Sales Tax (6%): $7.50
Total: $144.50

I want to have it like this:

Sub-Total: $125.00
Shipping: $12.00
Sales Tax (6%): $8.22 (6% of Sub-Total + Shipping -> $137.00)
Total: $145.22

Thank you!

Nobody?

I hire a freelancer for this. Just send me your offers.

Already fixed, thank you for your help!

Someone please close this thread.