Hello @MiaMia ,
Could you clarify what you mean? As far as I know, any PST and Liquor tax you pay are not refundable in any way. They have simply become a part of your business expenses.
If you're referring to collecting PST & Liquor tax, you would have to remit that to the government. The only time a refund would be appropriate is if you have overpaid PST or paid PST in error.
I apologize if I've misunderstood your question.