6 worked Quebec QST Return Filing case studies — the position a client typically comes to us with, what we do, and what it is worth. Each is an illustrative example built on the rules that apply to quebec qst return filing work, not a specific client's file.
Case Study 1 · Cash and remittance control
Instalments Rebased, $22,500 Of Cash Returned To The Business — Used-Equipment Dealer, Mississauga
A used-equipment dealer in Mississauga, Ontario was paying instalments calculated on a prior year. That year no longer reflected the business. A registration threshold crossed nine months before anyone registered was tying up $22,500 of cash.
Case 1: what we did
We rebased the instalments on the current-year estimate rather than the prior-year default. Alongside that, we brought the nil and missing periods current so the account was clean before the refund claim was filed.
Case 1: the result
$22,500 of cash stayed in the business, the penalty cycle ended, and the instalment position is reviewed each quarter against actual results.
Case Study 2 · Records and systems rebuilt
Books Rebuilt From Source, $11,000 In Unclaimed Input Tax Found — Mixed-Use Landlord, Hamilton
Client: A residential landlord also renting commercial space. Where: Hamilton, Ontario. Engagement: 10 weeks, fixed fee.
Unclaimed tax found$11,000
Records rebuilt26 months
ProcessDocumented
Case 2: the situation
A residential landlord also renting commercial space in Hamilton, Ontario could not answer basic questions about its own numbers. Management fees between two related registrants carrying tax that only ever went out and came back sat between the bank statements and the ledger.
Case 2: what we did
We set a defensible input tax credit allocation between taxable and exempt supplies and documented the method for future filings. We then documented the process so the work does not depend on any one person remembering how it was done.
Case 2: the result
Records rebuilt and reconciled, $11,000 recovered in input tax credits that the old file could not support, and a documented monthly process now in place.
Case Study 3 · Deadline rescue
Filed On Time From A Standing Start, $35,500 Penalty Avoided — Interprovincial Construction Supplier, London
Client: A construction supplier selling into three provinces. Where: London, Ontario. Engagement: 8 weeks, fixed fee.
Penalty avoided$35,500
Turnaround8 weeks
FiledOn time
Case 3: the situation
A construction supplier selling into three provinces in London, Ontario came to us 8 weeks before its filing deadline. The file came with input tax credits claimed on the exempt side of a mixed-supply business. A late filing would have triggered a penalty of roughly $35,500 before interest.
Case 3: what we did
We worked backwards from the deadline. We tested the quick method against the account’s actual input tax credit history and stayed on the regular method where the credits were worth more. We prioritised the items that actually gated the filing and deferred everything that did not.
Case 3: the result
The return was filed on time and complete. The $35,500 penalty never arose, and the compliance calendar we set means the next deadline is scheduled rather than discovered.
Case Study 4 · Objection and relief
Desk-Review Assessment Of $65,000 Vacated — Restaurant Group, Kitchener
A restaurant group in Kitchener, Ontario was carrying $65,000 of penalties and interest. The charges arose from a commercial property purchase closed on the assumption no tax applied because the vendor was not registered. Much of that amount accumulated during a period the CRA itself had delayed.
Case 4: what we did
We assembled the export documentation, restored zero-rating on the qualifying sales, and reduced the proposed assessment. We framed the relief application on the specific grounds the CRA guidelines recognise rather than on general hardship.
Case 4: the result
The assessment was vacated. $65,000 came off the account, and the documentation now on file makes the same position straightforward to defend next time.
Case Study 5 · Structure rebuilt
Corporate Structure Rebuilt For $70,000 Of Annual Savings — Late GST/HST Registrant, Moncton
Client: A seller who crossed the registration threshold before registering. Where: Moncton, New Brunswick. Engagement: 11 weeks, fixed fee.
Saving per year$70,000
DocumentationComplete
Transfer basisRollover
Case 5: the situation
The structure at a seller who crossed the registration threshold before registering in Moncton, New Brunswick dated from years earlier. It had been set up for a business that no longer existed. Export sales zero-rated with no shipping documentation behind them had become expensive.
Case 5: what we did
We rebuilt the sales ledger by customer province and applied the correct place-of-supply rate to each stream. We filed corrected returns before the CRA opened a review. The reorganisation used the rollover provisions rather than a taxable transfer, so no tax fell due on the restructuring itself.
Case 5: the result
$70,000 of annual saving, achieved on a tax-deferred basis. The minute book, elections and valuations are all in the file.
Case Study 6 · Backlog brought current
$25,000 Of Arbitrary Assessments Vacated After 6 Years — Cross-Border SaaS Company, Lethbridge
Client: A SaaS company with Canadian and US customers. Where: Lethbridge, Alberta. Engagement: 9 weeks, fixed fee.
Arbitrary tax vacated$25,000
Years brought current6
Account statusCurrent
Case 6: the situation
6 years of unfiled returns had turned into notional assessments at a SaaS company with Canadian and US customers in Lethbridge, Alberta. Underneath lay nil periods left unfiled, which held up the refund on the one period that mattered. Collections had already started.
Case 6: what we did
We self-assessed the tax on the real property acquisition in the correct reporting period and claimed the offsetting input tax credit in the same return. We then filed every outstanding year in chronological order so the CRA could vacate the notional assessments cleanly.
Case 6: the result
All 6 years were accepted as filed. $25,000 of arbitrarily assessed tax was vacated, collections action stopped, and the account is current for the first time in 6 years.
Reviewed by Udit Gupta, Founder and Tax Accountant for the 2025 tax year. These case studies are illustrative worked examples composed from the CRA rules that apply to this type of work, not specific client files; figures are representative and outcomes depend on your own facts.
