Aligning HST Filing Periods Fixed the Mismatch Between Two Cambridge Companies

The situation

The letter arrived on a Tuesday. The Canada Revenue Agency had flagged just under fifteen thousand dollars in input tax credits claimed between two related Cambridge companies, and the review notice gave Lindita a window to respond in writing before any adjustment was made final. She read it twice, then called her sister Drita, because neither of the figures in the letter matched what either of their own bookkeeping records showed.

Step back a few years and the story starts with two sisters building something out of very little. Lindita had come to Canada as a newcomer, working retail shifts while she learned how things worked here, and Drita had joined her not long after, taking a job as a forklift operator to help cover the bills while they saved. Together they eventually opened a small cleaning-supply retailer, and once that was steady, they registered a second incorporated company to handle contract cleaning services for local offices, with the retailer supplying products to the cleaning arm at wholesale prices.

The two companies were meant to work together, and mostly they did. But the sisters had registered each one for HST at a different point, and had ended up on different reporting periods almost by accident. The retailer filed quarterly. The cleaning company, smaller in its first year, had been set up on an annual filing period instead. Neither sister realized that when goods and services move between related companies sitting on different filing cycles, the tax collected on one side and the credit claimed on the other can land in different reporting windows and fail to visibly line up.

Their original bookkeeper, Abdi, had set up both companies and handled the first two years of filings, but he had since moved on to a larger firm and left limited notes behind. When the mismatch surfaced, the sisters were left trying to explain a technical accounting timing problem to a reviewer who wanted precise, documented answers, and Lindita's English, though solid for day-to-day business, was not built for tax terminology. She worried a misunderstood question over the phone could turn a fixable timing issue into a finding that the credits themselves were ineligible.

The two of them had never faced anything like this before. Every prior interaction either of them had with CRA had been routine, a straightforward personal return each spring, nothing that required the kind of technical back-and-forth a corporate review demanded. Drita, in particular, was rattled by the dollar figure in the letter, since fifteen thousand dollars was close to what the cleaning company's annual profit had been in its strongest year, and she assumed, wrongly, that the review meant they had done something they would now have to repay out of pocket rather than simply explain.

What the law actually said

The core problem was one of timing, not entitlement. Under the HST rules, every registrant is assigned a reporting period, usually monthly, quarterly, or annually, based on the volume of taxable supplies it makes. There is no election that lets related companies register or file as a single group for HST purposes: every registrant, related or not, files and reports on its own separate schedule, whether or not it has made any election with a related party. That, on its own, is completely normal and not a compliance problem.

Where it becomes a problem is reconciliation. The cleaning company had been invoiced roughly monthly by the retailer for supplies, and it had claimed input tax credits on those invoices as they were received, following its own annual filing rhythm. The retailer, filing quarterly, had reported the corresponding HST collected across four separate returns spread over the same year. On paper the two sets of numbers should still tie out once the full annual cycle closed, but the CRA's matching review had compared the cleaning company's single annual return against only the retailer's most recent quarterly filing, because that was the period open at the time of the review. The apparent gap was an artifact of comparing a twelve-month total against a three-month slice of it.

There was also a related-party option the sisters had never used. Because the two companies were closely related under the definition the Excise Tax Act applies, they could have filed a joint election to treat certain intercompany supplies as having occurred for no consideration, which would have kept HST from flowing between them at all and avoided the reconciliation problem entirely. Abdi had never filed that election. Its absence was not itself a violation, but it meant every intercompany invoice had to reconcile independently across periods that simply did not align, which is exactly the manual matching gap that produced the reviewer's letter.

Nothing in the law required the sisters to align their filing periods, and nothing required the election Abdi had skipped. What it required was that the numbers, once every relevant period was laid side by side, actually reconciled. That was the argument to make, and it depended on giving the reviewer the full annual picture rather than the partial quarterly slice the automated matching had compared.

It also mattered that this was a matching review rather than a full audit. A matching review is a lighter-touch process, usually triggered automatically when figures reported by two registrants do not appear to correspond, and it is generally resolved on the strength of documentation rather than through the longer, more adversarial process a full audit involves. That distinction shaped how quickly the sisters' file could realistically move, and it meant a clear, well-organized reconciliation had a genuine chance of closing the matter outright rather than simply narrowing the dispute for a later stage.

What we did

1. Requested the full review file and an extension of the response window. The initial letter gave a tight window built for a routine mismatch, not one spanning two companies on different filing calendars, and rushing an answer without the underlying matching data risked answering the wrong question entirely. Getting the extra time and the reviewer's own working numbers meant we could build an accurate reconciliation instead of a partial one, and it gave Lindita breathing room to gather the invoices herself without panic driving the process.
2. Arranged a qualified interpreter for every call with the reviewer. Lindita's English covered daily operations comfortably but not the specific vocabulary CRA reviewers use, and a single misunderstood question about 'the period in question' could easily have produced an answer that sounded like an admission rather than a clarification. Working through an interpreter on every call, not just the difficult ones, meant every question and every answer was precise on both sides, with nothing left to guesswork.
3. Rebuilt both companies' HST ledgers on a common rolling twelve-month calendar. Rather than comparing the cleaning company's annual return to the retailer's latest quarter, the way the reviewer's system had, we mapped every intercompany invoice by date across the full year for both companies, so the two sets of figures could be measured against the same window instead of mismatched slices of time that were never going to match on their own.
4. Prepared a consolidated reconciliation schedule. This document set out, invoice by invoice, the date, amount, HST collected by the retailer, and HST claimed by the cleaning company, with each pair cross-referenced to the specific quarterly or annual return it appeared on. It let the reviewer trace every dollar to its source in minutes rather than reconstructing the relationship between the two companies' filings from scratch.
5. Confirmed there was no double-claiming or inflated credit anywhere in the file. Before presenting anything to CRA, we independently checked that the cleaning company had not claimed a credit twice, or claimed on an invoice the retailer had not actually reported collecting tax on, since a genuine error in the file would need to be corrected honestly rather than defended, and we wanted to know that before the reviewer did.
6. Submitted a written response addressing the reviewer's specific line items. Rather than a general explanation of the two companies' relationship, the response walked through each flagged invoice individually using the reconciliation schedule, showing exactly which later return contained the matching entry the reviewer's original comparison had missed, so there was nothing left for the reviewer to infer.
7. Followed up by phone, with the interpreter present, to walk through the schedule directly. Written submissions can sit in a queue for weeks, so we also arranged a call to walk the reviewer through the reconciliation in real time, answering questions as they came up rather than waiting for a second round of correspondence to close gaps in understanding.
8. Advised the sisters on aligning their filing periods going forward. We recommended moving the cleaning company onto the same quarterly cycle as the retailer, which would not change either company's legal obligations but would make future returns far easier to match on sight, both for the sisters' own bookkeeping and for any reviewer who looked at the file again.

The outcome

The reviewer closed the file with no adjustment. Once the reconciliation schedule showed the full twelve-month picture, the just-under-fifteen-thousand-dollar figure CRA had initially flagged as unsupported input tax credits was accounted for entirely by returns filed in later quarters that had simply not been part of the original comparison. No credit had been overstated, and the sisters owed nothing beyond what they had already paid, and no penalty or interest was ever assessed against either company.

The resolution did not require reassessing either company's prior returns or amending anything already filed. It required demonstrating, with documents rather than argument, that the numbers already on file with CRA matched each other once the right periods were compared side by side. That distinction mattered for the sisters, since a formal reassessment would have shown up in both companies' compliance history going forward, even after being corrected, and could have made a future review, on an entirely unrelated matter, start from a more skeptical position than it otherwise would have.

The call with the reviewer, conducted through the interpreter, also mattered more than the sisters expected going in. Lindita told us afterward that being able to answer questions clearly and confidently, rather than guessing at technical phrasing, changed the tone of the whole exchange, and the reviewer's own notes on the file reflected a straightforward, cooperative resolution rather than an unresolved dispute carried forward.

Lindita moved the cleaning company onto a quarterly filing period the following year, matching the retailer's cycle, which should keep this specific kind of mismatch from recurring. The sisters also now keep a shared quarterly reconciliation between the two companies rather than relying on year-end cleanup, so a future review, if one comes, would have a ready answer rather than a scramble, and Drita in particular has said the process left her far less anxious about what a CRA letter actually means.

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