Sales tax is where a lot of Canadian businesses quietly fall out of compliance. ATS registers you for GST/HST with the CRA and QST with Revenu Québec, files your returns on time, and makes sure you claim every input tax credit and refund you’re owed — so you never overpay or miss a deadline.
Who files GST/HST and QST returns for a Canadian business? Your bookkeeper or accountant tracks the sales tax you collect and the tax you pay, then files periodic GST/HST returns with the CRA and QST returns with Revenu Québec — monthly, quarterly, or annually depending on your revenue. ATS handles the whole cycle for Québec and Canada-wide businesses: registration, tracking, input tax credits (ITCs) and input tax refunds (ITRs), and on-time filing, so the amounts are right and nothing is late.
In Québec you’re dealing with two tax authorities at once: GST with the CRA and QST with Revenu Québec. Elsewhere in Canada it’s GST or a combined HST. The rules for what you charge, what you can claim back, and when you file change with your revenue and where your customers are. ATS keeps it all straight — we track the tax through your bookkeeping, reconcile it, and file accurately so you claim the credits you’re entitled to and stay clear of interest and penalties.
If you collect GST, HST or QST — or should be — we can help.
From first registration to every filed return.
This page is general information, not tax advice for your specific situation. Sales-tax obligations depend on your revenue and where you sell — book a free consultation to confirm what applies to you.
Registered, tracked, reconciled, and filed on time.
We confirm whether you need to register, at what point, and which filing frequency fits your revenue and province.
We open your GST/HST and QST accounts and configure sales-tax tracking correctly inside QuickBooks or Xero.
Through your bookkeeping we capture the tax you collect and pay, then reconcile the accounts every period.
We prepare and file your returns with the CRA and Revenu Québec, claim your credits, and confirm remittance before the deadline.
GST/QST looks routine until a place-of-supply rule, a missed input credit, or a late return turns into interest and a Revenu Québec letter. ATS is a licensed CPA firm, a member of the Ordre des CPA du Québec, bilingual and built for exactly this Québec-plus-Canada reality — we file GST and QST together, apply the right rates province to province, and keep the tax reconciled to your books so year-end is clean.
Sales tax works best when it’s part of your monthly bookkeeping. ATS also handles corporate and personal tax, payroll, and full accounting services in Montréal. Préférez le français ? Voir TPS/TVH et TVQ.
