Invoice 8 is a document that is used in business to keep track of transactions between parties. It provides an itemized listing of goods or services that have been purchased and the corresponding costs. The invoice typically includes the date of purchase, the customer's name, the item(s) purchased, the cost of each item, any taxes applicable, and the total amount due. There are several types of Invoice 8, including the Pro Forma Invoice, the Tax Invoice, and the Commercial Invoice. The Pro Forma Invoice is used to provide an estimate of the cost of goods or services, and the Tax Invoice is used to calculate the applicable taxes. The Commercial Invoice is used to record a transaction for accounting purposes.