Tax Software for Quebec Accounting Firms

How does tax software work for firms in Quebec?

Revenu Québec administers both the GST/HST and the QST in Quebec under an agreement with the federal government — the only province where the provincial revenue agency collects the federal tax. Quebec registrants report GST and QST together to Revenu Québec, not to the CRA.

Revenu Québec administers both the GST/HST and the QST in Quebec under an agreement with the federal government — the only province where the provincial revenue agency collects the federal tax. That has a practical effect on a tax engagement: the sales-tax history a preparer needs at year-end sits with Revenu Québec rather than with the CRA, and authorizations have to exist with both administrations before anyone can pull it.

Do Quebec clients file a separate provincial return?

Quebec corporations file the federal T2 with the CRA and the CO-17 corporate return with Revenu Québec.

Quebec residents file two personal returns: the federal T1 with the CRA and the TP-1 with Revenu Québec. Quebec is the only province where individuals file separately with both administrations.

Model the CO-17 as its own obligation on the client record rather than as a step inside the federal file. Two returns with two administrations means two sets of correspondence, two authorization relationships and two things that can be outstanding — and a stage buried inside another file is a stage nobody can see is stuck.

What is different about running a practice in Quebec?

Four things a firm working Quebec files should be able to state without looking them up. Each is verified against a primary source, linked at the foot of this page.

Ordre des comptables professionnels agréés du Québec is the provincial body; 228,622 of Quebec's 233,235 employer businesses were small businesses as of December 2024.

• Two tax administrations, every client — A Quebec corporation files a T2 with the Canada Revenue Agency and a CO-17 with Revenu Québec. A Quebec individual files a T1 with the CRA and a TP-1 with Revenu Québec. Every Quebec engagement carries two filing relationships instead of one.
• Revenu Québec collects the GST too — Quebec is the only province where the provincial revenue agency administers the federal GST/HST alongside its own QST, so Quebec registrants report both taxes to Revenu Québec.
• A lower personal instalment threshold — Quebec residents must pay personal tax instalments when net tax owing exceeds $1,800, against $3,000 for residents of every other province and territory — so more Quebec clients are instalment clients.
• Bill 96 francization obligations — Under Quebec's Law 14 (Bill 96), businesses with 25 or more employees in Quebec for six months must register with the OQLF and undergo francization, covering workplace communications, tools and IT systems. Non-compliance carries fines and exclusion from Quebec government contracts.

Which CRA deadlines apply?

These rules are federal and apply in every province and territory. Where a due date falls on a weekend or public holiday, the CRA treats the next business day as on time — compute the shifted date each year rather than carrying the calendar forward.

Managing tax software across a client book in Quebec

Tax practices lose returns to process, not to preparation: a file waiting on one slip looks identical to a file being worked, and a corporate year-end six months back has a filing date nobody is watching.

A six-person Montreal practice models every corporate client as three obligations rather than one: the federal T2, the Quebec CO-17, and a combined GST/QST return filed with Revenu Québec. Personal clients carry two returns, T1 and TP-1. The failure mode is not forgetting a deadline — it is maintaining two calendars that quietly disagree, so the practice keeps both administrations' dates on a single board and sends client correspondence in the client's language on the firm's own letterhead.

How SpidNums handles it

SpidNums models the firm as clients, services and work. Assigning a typed service to a Quebec client is what generates the recurring projects, the stages and the reminders — the cadence is recorded once rather than remembered each period.

Every open obligation is then ranked by how close its due date sits and coloured accordingly, so the morning question — what is late, what is close, what is fine — is answered by looking.

• T1 season projects with document-chase, prep and review stages
• Fiscal-year-end-driven T2 reminders at year-end minus one month
• Separate tracking for the filing deadline and the earlier balance-due date
• Kanban or table views per engagement type
• Reminder digests to the assigned preparer
• E-signed engagement letters before work opens

Where this goes wrong

Tax practices rarely fail at the preparation. They fail at the edges of the engagement, where a file is waiting on something and looks exactly like a file being worked.

• The filing date is tracked and the earlier balance-due date is not, so a return filed on time still accrues interest.
• A corporate client's year-end changes and the reminder rule still points at the old month.
• A file stalls waiting on one slip and nobody chases it, because a stalled file and a working file look the same on a desk.
• The June 15 self-employed tail is forgotten after the April push, along with the April 30 payment those clients still owed.

What SpidNums does not do

SpidNums does not prepare or transmit returns. Your T1s and T2s are prepared and EFILEd in your tax software; SpidNums tracks the engagement, the stages, the owners and the deadlines around it.

If your firm already runs a tracking system it trusts, the honest answer is that you do not need this one. The pages on this site are written to help you decide, not to pretend every firm has the same problem.