1.  Configure your database to utilize Harmonized Sales Tax (HST).
2.  Create Activity Types.  These house your GST and PST rebate percentages as well as their receivable accounts.
3.  Create Invoices with the appropriate sales tax item and PSB codes.

For additional information on configuration and Harmonized Sales Tax, please utilize The Financial Edge Guide for Canada.

For additional information on the appropriate tax and rebate percentages, please visit the Canada Revenue Agency Website.