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№ 297 Case Study — Tax

The Kitchener Waiver That Cost One Parent a Year of Credits

Nasrin's question was simple: how could her ex-partner claim their son as a dependant for the year she had him the most, when nothing had actually changed at home?

Tax8 min readKitchener, OntarioEligible dependant credit disputes
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ClientNasrin, an administrative assistant in Kitchener raising her son through a mid-year separation
The issueA signed waiver during separation handed the eligible dependant credit to the other parent for the year of the split
ServiceChallenged the waiver's scope and negotiated which parent could claim the credit in future years
ResolutionPartial win — the year of separation stayed with the other parent under the signed agreement, but the claim reverted to Nasrin going forward

The situation

Nasrin's question, when she first called our office, was the one most people ask in her position: how could her former partner claim their son as a dependant for a year when the boy had lived with her the majority of the time, gone to school in her neighbourhood, and been picked up from every appointment by her? Nothing about her son's day-to-day life had changed when she and Wei separated partway through the year. What had changed was a piece of paper she barely remembered signing.

Nasrin worked as an administrative assistant at a farm equipment dealership outside Kitchener, and she and her family kept a small hobby farm on a few acres they had bought years earlier, mostly for the animals rather than any real income. Wei worked as a bookkeeper for a local contractor. They had been together for six years and had one son, and when they separated in the spring, the split was reasonably amicable at first. They agreed, informally, that their son would live primarily with Nasrin, with Wei having him on alternating weekends.

In the weeks after the separation, overwhelmed and trying to get her finances in order before the summer, Nasrin had gone to a community tax clinic run out of a strip mall near her work, where a preparer named Karima helped walk her through some paperwork related to updating her benefit information with the government following the separation. Nasrin remembered signing several forms that day. She did not remember, clearly, that one of them was an agreement about who could claim their son as an eligible dependant for that specific tax year.

The eligible dependant credit is available to a parent who is not married or living common-law and who supports a child in a home they maintain, but it can only be claimed by one parent for a given child in a given year, even when both parents genuinely share parenting time. When two separated parents both try to claim it for the same year, the claim that was filed and processed first usually stands unless the other person disputes it, and once a signed agreement exists giving the claim to one parent, the government treats that agreement as meaningful evidence of who is entitled to it, whatever the actual parenting arrangement looked like on the ground.

The problem

The document Nasrin had signed at the clinic was a short form, part of a stack Karima had prepared that day, indicating that for the year of separation, Wei would be the parent claiming their son as an eligible dependant. Nasrin had no memory of that clause standing out to her. She recalled being told the paperwork was about updating the government on her new address and marital status, which some of it genuinely was, and she had signed without reading each page closely, trusting that a preparer working out of a community clinic would not put something significant in front of her without flagging it.

Wei, when we later understood the full picture, had also visited the same clinic separately a few weeks earlier and had a similar conversation with Karima about the family's tax situation for the year. Karima appeared to have used the form as a way to prevent both parents from claiming the same credit and triggering a dispute with the government, which is a real risk when two parents split the same tax year without any agreement in place. The intention was not malicious. But the form had been presented to each of them individually, without either parent fully understanding they were giving up a claim the other might otherwise not have been entitled to, given that Nasrin was the parent with the greater share of parenting time.

By the time Nasrin filed her own return the following spring and tried to claim the credit for their son, her claim was rejected because Wei's return, filed earlier, already reflected the signed agreement. When Nasrin disputed it, the signed form worked against her rather than for her: it was treated as evidence that the parents had reached their own arrangement about the claim, which the government generally respects rather than second-guessing based on informal accounts of parenting time.

The deeper problem was that the form did not say anything about future years, only the year of separation itself, but nobody had clarified that at the time either. Wei, understandably, assumed the arrangement would simply continue, since nothing had been said to suggest otherwise, and had already claimed the credit again the following year before Nasrin raised the issue with us. Without a fresh agreement covering that second year, the government had no way to know the two parents disagreed about who was entitled to claim it, and it processed Wei's return exactly as it had the first time, on a first-filed basis, leaving Nasrin to discover the problem only after her own return came back rejected.

What we did

  1. Obtained a copy of the signed form from the clinic's own records, since Nasrin no longer had her copy and could not remember exactly what it said. This let us establish precisely what she had agreed to and, just as importantly, what the document did not say, which turned out to be anything at all about years beyond the single year of separation it named.
  2. Reviewed the actual parenting arrangement for each of the two disputed years in detail, gathering school enrolment records, medical appointment history and Nasrin's own calendar notes covering pickups and evening routines, to document clearly that she was the parent actually maintaining the home their son lived in the majority of the time in both years under review, well beyond what the alternating-weekend schedule alone would have suggested on paper.
  3. Accepted the year-of-separation claim as settled, advising Nasrin honestly and early that contesting the first year was unlikely to succeed given her own signature on a document that specifically addressed that exact year. Spending effort fighting an agreement she had, however imperfectly, actually made was not the strongest use of her limited time and money, and we told her so plainly rather than promising a fight we did not expect to win.
  4. Contested the second year directly, arguing in writing that the signed form had no application beyond the single year it named, and that Wei's continued claim in the following year rested on an unstated assumption rather than any actual agreement between the parents, while the real parenting arrangement, documented in the previous step, clearly supported Nasrin as the properly eligible claimant going forward.
  5. Raised the clinic's role carefully with Wei's own representative during the dispute, not to assign blame to Karima or to either parent, but to establish plainly that neither of them had received a clear explanation of what the form meant or how long its terms were meant to apply, which supported treating the two years differently rather than as one uninterrupted arrangement.
  6. Negotiated directly with Wei through his representative rather than pushing the matter entirely into a formal dispute process, since both parents still needed to co-parent their son for many years to come and an adversarial fight over one tax credit risked damaging a working relationship neither of them could really afford to lose, especially over an outcome the documented parenting record already supported clearly.
  7. Confirmed the resolution in writing with both the government and between the two parents directly, documenting that the year of separation stood exactly as claimed by Wei under the signed agreement, and that the eligible dependant credit would belong to Nasrin for the following year and every year after, based on the actual, documented parenting arrangement, with a note in the file explaining why the two years were treated differently in case either parent's circumstances were ever questioned again.

The outcome

The result was a genuine split, not a clean win for either side. The credit for the year of separation, worth roughly two thousand dollars, stayed with Wei, because the signed form specifically addressing that one year could not reasonably be undone after the fact, whatever the confusion behind it at the time. Nasrin had to accept that loss rather than fight a document carrying her own signature, and we told her plainly, before any negotiation began, that a dispute over that specific year was not a fight worth pursuing given how clearly it was worded.

The following year and every year going forward, the claim reverted to Nasrin, matching the actual arrangement of where their son lived, who packed his lunches, and who maintained the home he grew up in day to day. On its own, the credit was worth roughly two thousand dollars a year, but secured for every year still ahead before their son turned eighteen, the reversion represented closer to twenty thousand dollars in credits Nasrin would otherwise have kept losing to an assumption nobody had actually agreed to. Wei agreed, through his representative, to amend the return that had claimed the credit a second time, which avoided a formal dispute process that would otherwise have taken months to resolve and would have strained a co-parenting relationship both of them still relied on heavily for their son's day-to-day stability.

Nasrin left the process with a clear, written understanding governing future years rather than an informal assumption that could easily be misread again the next time either parent's circumstances changed, and a specific, hard-won caution about signing paperwork at any clinic or tax preparer's office without asking exactly what each individual form commits her to, particularly during a period as disorienting and rushed as a separation. The one year she lost became, in the end, the clearest lesson she took away from the whole process, and it is the example she now brings up whenever a coworker mentions using a discount tax clinic without reading the paperwork closely first, a habit she says she wishes someone had warned her about before that first stressful visit.

What you can learn from this

  • Only one parent can claim the eligible dependant credit for a child in a given year, even when parenting time is genuinely shared; a signed agreement can settle which parent it is.
  • Read every page of paperwork from a tax clinic or preparer before signing, especially during a separation; a form described as routine can contain a real commitment about a credit.
  • A signed agreement about a tax credit usually applies only to what it specifically states; do not assume it continues into future years unless the document says so.
  • If a dispute over a credit is genuinely close, weigh the cost of fighting it against the value of the co-parenting relationship you still need for years to come.
  • Keep your own copies of anything you sign related to your taxes or benefits; not having a copy makes it much harder to argue later about what a document actually covered.
This case study is entirely fictional. It does not describe any real client, file, or matter handled by Treadstone Law, and it is not a real file with details changed. All names, people, properties, businesses, dollar amounts, dates, and events are invented, and any resemblance to a real person, business, or situation is coincidental. Fictional scenarios like this one illustrate the kinds of legal issues people in Ontario commonly face and how a lawyer can help. They are general information, not legal advice — no two matters unfold the same way, and nothing here predicts the outcome of any real case. Reading a case study does not create a lawyer-client relationship. If you are facing something similar, speak with a lawyer about your specific circumstances.

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