Company lists · Data refreshed October 2026

Top 25 Tax defense attorneys based in Canada

Name: Tax defense attorneys based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 22, 2026 136 companies tracked

RevenueBase identified 136 company matches for tax defense attorneys associated with Canada as of October 2026 and tracks 939 professional contacts across them, including 492 with verified work emails. Toronto is the largest hub.

This list covers company matches for tax defense attorneys associated with Canada, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 22, 2026 How this list was built

136Companies

939Contacts tracked

492Verified emails

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The 25 largest tax defense attorneys based in Canada

Ranked by team size

Top 25 of 136 company matches for tax defense attorneys based in Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 22, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Thorsteinssons TAX Lawyers	Exact match	Vancouver, BC, CanadaHQ recorded Oct 22, 2026	51-200	110 contacts →
	Exact match “Thorsteinssons is the largest Canadian law firm practicing exclusively in Tax.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
2	Kenway Mack Slusarchuk Stewart LLP	Exact match	Calgary, AB, CanadaHQ recorded Oct 22, 2026	51-200	74 contacts →
	Exact match “At KMSS we strive to provide an extraordinary experience.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
3	Felesky Flynn LLP	Exact match	Edmonton, AB, CanadaHQ recorded Oct 22, 2026	51-200	73 contacts →
	Exact match “With offices in Calgary, Edmonton and Saskatoon, Felesky Flynn LLP provides Canadian and international tax planning, tax representation and litigation, and wills and estates…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
4	Wilson Vukelich LLP	Exact match	Markham, ON, CanadaHQ recorded Oct 22, 2026	51-200	52 contacts →
	Exact match “Our law firm is your strategic business partner.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
5	Rosen & Associates TAX LAW	Exact match	Toronto, ON, CanadaHQ recorded Oct 22, 2026	11-50	37 contacts →
	Exact match “Rosen & Associates Tax Law (“R&A Tax Law) is a national tax law firm based in Toronto, Ontario.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
6	Beitel TAX LAW LLP	Exact match	Toronto, ON, CanadaHQ recorded Oct 22, 2026	11-50	25 contacts →
	Exact match “Beitel Tax Law (formerly Farber Tax Law) is a tax boutique representing businesses and their owners in conflict with the Canada Revenue Agency.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
7	Kaushal & Co. CPA	Exact match	New Westminster, BC, CanadaHQ recorded Oct 22, 2026	11-50	21 contacts →
	Exact match “Kaushal & Co.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
8	Pellerin Aubert Ramsay Provencher INC	Exact match	Victoriaville, QC, CanadaHQ recorded Oct 22, 2026	51-200	18 contacts →
	Exact match “Pellerin Aubert Ramsay Provencher inc, fondé en 1980, a son siège social à Victoriaville.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
9	Barsalou Lawson Rheault LLP	Exact match	Montréal, QC, CanadaHQ recorded Oct 22, 2026	11-50	16 contacts →
	Exact match “Barsalou Lawson Rheault is recognized as one of Canada’s leading tax law firms.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
10	Periscope Fiscalistes INC	Exact match	St-jean-sur-richelieu, QC, CanadaHQ recorded Oct 22, 2026	1-10	15 contacts →
	Exact match “Avec son équipe spécialisée en fiscalité, Periscope met à profit un large spectre de connaissances nichées afin de vous conseiller en toute transparence et objectivité dans la…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
11	Taxpayer LAW	Exact match	Toronto, ON, CanadaHQ recorded Oct 22, 2026	11-50	15 contacts →
	Exact match “Taxpayer Law \| Tax Litigation & Dispute Resolution For inquiries, contact igor@taxpayer.law or visit At Taxpayer Law, we focus exclusively on tax litigation and dispute resolution.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
12	Tbpk L.L.P. Multidisciplinary Partnership	Exact match	Montréal, QC, CanadaHQ recorded Oct 22, 2026	11-50	14 contacts →
	Exact match “Integrated services in legal services, finance, taxation and accounting.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
13	Martel Cantin	Exact match	Montréal, QC, CanadaHQ recorded Oct 22, 2026	11-50	13 contacts →
	Exact match “Depuis plus de 50 ans, l'offre de Martel Cantin est simple: un accompagnement empathique et stratégique.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
14	Effisca TAX	Exact match	Montréal, QC, CanadaHQ recorded Oct 22, 2026	1-10	13 contacts →
	Exact match “Our expertise: American taxation: Our team has decades of experience in US taxation.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
15	Zuleta Associates INC	Exact match	Cambridge, ON, CanadaHQ recorded Oct 22, 2026	11-50	13 contacts →
	Exact match “Cambridge Home \| Cambridge Tax Consultant” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
16	JGW Avocats ET Conseillers D'affaires Inc. JGW Business And TAX LAW INC	Exact match	Laval, QC, CanadaHQ recorded Oct 22, 2026	11-50	12 contacts →
	Exact match “JGW Avocats et conseillers d’affaires inc, est un cabinet boutique qui œuvre exclusivement en droit des affaires ayant pour mission d’être partenaire d’affaires de ses clients.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
17	Counter TAX Litigators LLP	Exact match	Toronto, ON, CanadaHQ recorded Oct 22, 2026	11-50	12 contacts →
	Exact match “Counter Tax Litigators LLP focuses exclusively on tax disputes involving established private companies and executive-level CRA exposure.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
18	Millar Kreklewetz LLP TAX & Trade Lawyers	Exact match	Toronto, ON, CanadaHQ recorded Oct 22, 2026	11-50	12 contacts →
	Exact match “Millar Kreklewetz LLP is a Canadian super-boutique law firm, focused on Indirect Tax, Customs and International Trade.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
19	Patenaude TAX Trust INC	Exact match	Montreal, QC, CanadaHQ recorded Oct 22, 2026	1-10	10 contacts →
	Exact match “We are a boutique law firm specializing in tax planning for private clients.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
20	Taxchambers LLP	Exact match	Toronto, ON, CanadaHQ recorded Oct 22, 2026	11-50	10 contacts →
	Exact match “TaxChambers LLP is a tax law firm located in Toronto's financial district.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
21	Comtax International	Exact match	Montreal, QC, CanadaHQ recorded Oct 22, 2026	11-50	9 contacts →
	Exact match “COMTAX Since 1986 For over 20 years our team has excelled at looking at taxation from a different perspective.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
22	Barrett TAX LAW	Exact match	Vaughan, ON, CanadaHQ recorded Oct 22, 2026	11-50	8 contacts →
	Exact match “Barrett Tax Law, a national tax law firm based in Toronto, Ontario, provides expert legal tax advice and representation by experienced tax lawyers to small business owners and the…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
23	Rotfleisch & Samulovitch P.C	Exact match	Toronto, CanadaHQ recorded Oct 22, 2026	11-50	8 contacts →
	Exact match “Individuals, businesses of all sizes, organizations and even charities will face tax issues from time to time.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
24	ML Kaufman	Exact match	Montréal, QC, CanadaHQ recorded Oct 22, 2026	11-50	8 contacts →
	Exact match “Kaufman is a firm of business lawyers, who focus on their clients' business reality when giving advice.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
25	Payne LAW Professional Corporation	Exact match	Toronto, ON, CanadaHQ recorded Oct 22, 2026	1-10	8 contacts →
	Exact match “Civil, commercial, estates, tax, and employment litigation.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “tax defense attorneys”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 136 tax defense attorneys based in Canada

See the full list, filter by size, metro and specialty, and access 492 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Tax defense attorneys based in Canada at a glance

As of Oct 22, 2026

52.4%Verified-email coverage

6.9Average contacts per company

1-10Median size (employees)

26.5%Largest-city concentration · Toronto

Oct 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 136 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Canada whose business descriptions match “tax defense attorneys” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 492 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 22, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Tax defense attorneys by metro

Tax defense attorneys in Toronto36

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “tax defense attorneys”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tax defense attorneys are there based in Canada?

RevenueBase identified 136 company matches for tax defense attorneys associated with Canada as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Thorsteinssons TAX Lawyers tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most tax defense attorneys?

Toronto leads with 36 company records, followed by Montreal (15) and Vancouver (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 492 professional contacts with verified work emails tracked across these 136 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 22, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.