Thank you for the reply,
the operations for a taxes and product creation I had already done them but for me the price in storefront must be included VAT not excluded...
The problem is: I create the product with price 1000€, assign the tax (VAT) of 22% and in store appear the right price (1000€) but in the cart this tax is summed at the price not unbundled as it should be...
In the cart:
1000 + VAT(22%) = 1220€ NOT correct;
819 +VAT(22%) = 1000€ correct
I hope I was clear....