special tax

Hi,
in Italy here is a special tax called "siae" that depends from the capacity of a pendrive.

This tax has a fixed price per unit, not in percentage.

So if you buy:
10 pendrive of 1Gb then you pay €0.10x10 = 1€
10 pendrive of 32Gb then you pay €2.88x10 = 28.8€

Is it possible to add this new item on checkout ?

Hi,

There is no option to do that. You would need to create a hikashop plugin which would calculate that special tax and add it to the cart total.

Here is an example of such plugin

About the code:

So I have to create a new entry siae for product ?

Yes, in that example, you would have to create a custom product field with the column name "siae" where you would enter the tax amount for one product.