seweral on "[Plugin: WooCommerce - excelling eCommerce] Only one tax for the shipping"

I have the question concerning for the shipping tax.
Product "A" there is a 23% taxed in the amount, product "B" 7%.
But the transport ALWAYS has a 23% of the tax, because is not having anything to do with the commodity tax. How to do it?

I thank for ideas.
Jacek

http://wordpress.org/extend/plugins/woocommerce/