HST change in Profitek
Open Profitek Back Office
On the Housekeeping drop down menu, choose the System Parameters option.
-Then select the Tax/Interest Charge option circled below.

The listed taxes are setup on this screen. Change the GST to read HST and or GST Vat to say HST Vat. Change the 5% rate to 12% as required. Change the PST to be 0.00%.
In the future when editing items, it would be good housekeeping to remove / deselect the item tax flags related to PST.