Strategic Tax Dispute Resolution and Tax Litigation

Facing a tax dispute or CRA audit or negative assessment? Our experienced tax litigation experts in Markham serve clients across Ontario, advocating for and representing businesses and individuals against unfair tax assessments, audits, and other challenges.

Comprehensive Tax Dispute Resolution and Tax Litigation Services

From audit defence to tax court representation, we provide expert legal representation to protect businesses and individuals from unfair tax assessments, penalties, and CRA disputes. Our experienced tax litigation team is ready to defend your rights and minimize your financial risk.

CRA Audits & Investigations

CRA audits can be stressful and time-consuming. We guide you through the audit process, ensuring compliance while protecting your financial interests.

Tax Appeals & Objections

If you disagree with a CRA reassessment, we file formal objections and represent you in the appeals process to challenge unfair tax rulings.

Voluntary Disclosures Program (VDP) Assistance

Need to correct past tax filings? We help clients voluntarily disclose errors to the CRA while reducing penalties and avoiding legal action.

SR&ED Claim Services

Our team has significant experience when it comes to defending SR&ED Claims at the audit level as well as litigation. Our firm has a strong track record in the Tax Court Of Canada in advocating for SR&ED claimants.

GST/HST & Corporate Tax Disputes

We assist businesses facing disputes over GST/HST, corporate tax assessments, and other business tax liabilities, ensuring compliance while minimizing financial impact.

Tax Court Litigation & Settlements

If a dispute escalates to tax court, we provide effective legal representation to fight for the best possible outcome, whether through trial or negotiated settlements.

Why Fighting a Tax Dispute is Critical


Facing a tax dispute can be overwhelming, but ignoring it can lead to severe financial and legal consequences. The CRA has extensive resources to enforce tax assessments, and without proper representation, you may face excessive penalties, interest charges, or even legal action. Whether you're dealing with an audit, a reassessment, or allegations of tax fraud, having an experienced tax litigation expert on your side ensures your rights are protected. Proactively addressing disputes can prevent costly mistakes and lead to reduced tax liabilities, successful appeals, or favorable settlements.

Our Process: Strategic, Proactive, and Results-Driven Tax Defense

Case Evaluation & Strategy Development

Every tax dispute starts with understanding the full scope of the issue. We begin with a detailed review of your CRA notice, tax filings, financial records, and any prior correspondence to assess the strengths and weaknesses of your case.

Our team identifies legal grounds for objections, potential negotiation opportunities, and areas where the CRA may have overstepped. Based on this evaluation, we develop a customized defense strategy—whether it involves filing an objection, seeking administrative relief, or preparing for litigation. The earlier we get involved, the better we can position your case for success.

Representation & Dispute Resolution

Once we have a strategy in place, we take over all communication with the CRA, shielding you from unnecessary stress and ensuring your legal rights are upheld. We handle everything from audit responses and formal objections to negotiating settlements or payment arrangements on your behalf.

If the CRA has issued an unfair reassessment, we advocate aggressively to challenge their findings, using legal precedents, tax law interpretations, and financial evidence to fight for a reduction—or even elimination—of penalties and tax liabilities. Our goal is to achieve the most favorable outcome possible without escalating to court, saving you time and legal costs.

Litigation & Final Resolution

If your dispute cannot be resolved through negotiations or objections, we are fully prepared to take your case to the Tax Court of Canada or Federal Court. Our experienced tax litigators build a strong case by gathering expert testimony, financial analysis, and legal arguments to challenge the CRA’s claims.

We represent you through every stage of litigation, ensuring that your position is clearly and persuasively presented before the court. Whether through a favorable ruling or a negotiated settlement, we fight to secure a fair resolution—helping you move forward with your business and financial future intact.

Frequently Asked Questions

Don’t ignore it—timing is critical. Whether it’s an audit request, reassessment, or penalty notice, reach out to tax advisors immediately. If Quantum Business Law is offering assistance, we will review your situation and develop a response strategy to protect your interests.

Yes. If you believe the CRA has made an error in your reassessment, you have the right to file a formal objection. Our team can handle the appeal process, gather supporting evidence, advocate for your rights and challenge unfair tax rulings.

Not always. Many tax disputes are resolved through negotiation or administrative appeals with the CRA. However, if necessary, we are fully prepared to represent you in Tax Court or Federal Court to fight for a fair outcome.

Tax law is complex, and dealing with the CRA without legal representation or proper advice can lead to missed deadlines, higher penalties, or even personal liability for business tax issues. A tax litigation expert ensures you have a strong case and the best chance of success.

Todd Louie
Senior Partner - Tax Planning

Experienced Tax Litigators Protecting Your Business & Financial Future

Quantum Business Law represents a wide array of business clients seeking representation on tax law, tax litigation, corporate & commercial litigation, class action litigation and mediation. Our partners have decades of successful experiences with corporations, partnerships, entrepreneurs, and ultra-high-net-worth individuals. At Quantum, our tax and litigation teams are ready to offer a comprehensive level of service seldom seen in the legal field.

Decades of Experience

Proven Success In Tax Disputes

Comprehensive Legal & Tax Expertise

Dedicated to Protecting Your Business & Assets

Jonathan Burshtein
Partner

Vany Andrasin
Senior Associate

Jordan Louie
Associate

Resolve Your Tax Dispute – Contact Us Today

Located in Markham, we proudly serve businesses and individuals across Ontario. If you’re facing a tax dispute, audit, or CRA reassessment, our experienced tax litigation experts are ready to help. Fill out the form below, and we’ll be in touch soon.

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