Indicating the Taxes
When you make a taxable supply (excluding zero-rated supplies), you must advise the recipient of the good or service that the sale is subject to GST and QST. You can do this by specifying the amount of the taxes on the cash register receipt, invoice or sales contract, or by posting signs in your store or business that clearly state that the taxes are included in your prices. Whatever means you choose, you must ensure that the GST and QST are either indicated separately from the price or included in it. The tax must be designated by its name, its abbreviation or a similar indication.