Electronic invoices encourage organizations to discontinue the use of paper invoices, replacing them with a digital version of an electronically_generated tax document, which has the same legal validity as the traditional version and preserves a faithful record of all commercial transactions. In this way, the entire billing process can be administered electronically. However, it is important to remember that amount of Value Added Tax must be included on every Invoice.
Invoice example With GST & PST An invoice not only shows the customer or client how much money is due but provides tax information, in some countries multiple taxes may apply, for example in Canada it is required to put the Supplier's identification numbers for GST and QST taxes purposes. Whenever a taxable sale is made, the customer must be informed that GST and QST are added to the selling price. As there are no standard invoices required by law for this purpose, you must indicate the amount of the taxes on the cash register receipt; on the invoice or contract remitted to the customer. If you choose to indicate the GST and the QST, the amounts must be stated clearly.The European Union requires a VAT (value added tax) identification number on invoices between entities registered for VAT.