January 24, 2013 (Revised) The province will transition back to the Provincial Sales Tax (PST), which replaces the Harmonized Sales Tax (HST) on April 1, 2013. Until then, the province has transitional rules for new homes which took effect on April 1, 2012. Note: Enhanced HST New Housing Rebate Effective April 1, 2012, your clients may be eligible for ...