QST
Noun
Meaning
QST (uncountable)
(Canada, taxation) Initialism of Quebec sales tax.
Examples
Most businesses can claim back the GST, HST and QST they pay, and so effectively it is the final consumer who pays the tax.
Hunting Trouble on 28 Megacycles, A. L. Blais, QST, January 1930.
They pay a carbon tax, federal excise tax, provincial fuel tax and a public transit tax – and then the GST and QST is taxed on top of that.