What is the difference between sales tax invoice and commercial invoice?

An invoice is a commercial document issued by a seller to a buyer, indicating the products, quantities and agreed prices for products or services that the Seller has already provided the Buyer with. An invoice indicates that, unless paid in advance, payment is due by the buyer to the seller, according to the agreed terms.

while sales tax invoice is the where all the taxes that are required by law are reported along with the price of product.