Hi

Have tried to figure out a way of doing this. I have a childrens clothing store. In the uk, childrens clothing under a certain size is zero rated. Over these sizes it is 17.5% tax.

Is there a way to show the different prices for a single product depending on the size. For instance, if an item picked is 124cms the price is say £10, if that same item is chosen in a bigger size, say 149cms i am obliged to add 17.5% tax to it, making it £11.75. Is there any neat way (or otherwise) to do this?

Please help, I am live and selling without tax, which I will have to pay the taxman out of my pocket if I cannot find a way to solve this.