Ontario HST at 13%, handled in the books
Ontario uses the Harmonised Sales Tax: 5% federal GST + 8% Ontario provincial portion, blended into one rate at point of sale. It is administered by the Canada Revenue Agency (CRA), so an Ontario business registers once and files one GST/HST return.
HelloBooks applies HST to each invoice line, records the HST you pay on business purchases as input tax credits, and keeps both in the ledger so your return figures are always current. HelloBooks prepares those figures; you file the return with the CRA.