Noun
QST (uncountable)
(Canada, taxation) Initialism of Quebec sales tax.
Most businesses can claim back the GST, HST and QST they pay, and so effectively it is the final consumer who pays the tax. Source: Internet
Hunting Trouble on 28 Megacycles, A. L. Blais, QST, January 1930. Source: Internet
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. Source: Internet