apply new tax for all products

[magicf]

Hi,

I created a new tax in VM2. How can I apply it for all products at one step?
I have hundreds of category so it is hard to select all category during I create new tax.
I have thousands of product so it is hard to modify all one by one.
I didn't used tax before for my products but the local government rules changed.

I can do it by modifying the SQL database but it is not so nice solution. (UPDATE `j17_virtuemart_product_prices` SET `product_tax_id`=0)

Thanks.