Company lists · Data refreshed November 2026

Top 25 Tax controversy services based in Canada

RevenueBase identified 52 company matches for tax controversy services associated with Canada as of November 2026 and tracks 272 professional contacts across them, including 116 with verified work emails. Toronto is the largest hub.

This list covers company matches for tax controversy services 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 November 6, 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 Nov 6, 2026 How this list was built
52Companies
272Contacts tracked
116Verified emails
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The 25 largest tax controversy services based in Canada

Ranked by team size
Top 25 of 52 company matches for tax controversy services based in Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchToronto, ON, CanadaHQ recorded Nov 6, 202611-5039 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchToronto, ON, CanadaHQ recorded Nov 6, 20261-1020 contacts →

Exact match

“Prime Tax Solutions is a Group of Professionals and Individuals Who Appreciate that Not Everyone’s Needs are the Same.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchMontréal, QC, CanadaHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Barsalou Lawson Rheault is recognized as one of Canada’s leading tax law firms.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchToronto, ON, CanadaHQ recorded Nov 6, 202611-5015 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 · Nov 6, 2026 · View company records in RevenueBase
5Exact matchCambridge, ON, CanadaHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“Cambridge Home | Cambridge Tax Consultant”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchMontréal, QC, CanadaHQ recorded Nov 6, 20261-1013 contacts →

Exact match

“Our expertise: American taxation: Our team has decades of experience in US taxation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchToronto, ON, CanadaHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“TaxChambers LLP is a tax law firm located in Toronto's financial district.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchBrampton, ON, CanadaHQ recorded Nov 6, 20261-1010 contacts →

Exact match

“We're dedicated to our clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchVaughan, ON, CanadaHQ recorded Nov 6, 202611-508 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 · Nov 6, 2026 · View company records in RevenueBase
10Exact matchRichmond, BC, CanadaHQ recorded Nov 6, 20261-107 contacts →

Exact match

“The Canada Revenue Agency (CRA) provides taxpayers with several telephone help lines, through which taxpayers can obtain both general tax information and information specific to…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchBrantford, ON, CanadaHQ recorded Nov 6, 20261-107 contacts →

Exact match

“We understand that life is complicated, which is why we believe that income tax and accounting shouldn't be.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchVancouver, BC, CanadaHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Schmidt & Gilmour Tax Law is a British Columbia based law firm practising exclusively in the areas of tax litigation and tax controversy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBrossard, QC, CanadaHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Fondé en 1991 par Madame Renée Gallant FCPA, FCA, M.Fisc, le cabinet est une des premières pratiques autonomes d'importance en fiscalité au Canada.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchMontreal, QC, CanadaHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Situé au cœur de Bromont et de Vieux-Port Montréal, Twin Lisbet offre une gamme complète de services juridiques spécialisés en droit fiscal, en droit des affaires, ainsi qu’en…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchCalgary, AB, CanadaHQ recorded Nov 6, 202611-505 contacts →

Exact match

“We are a team of tax professionals on a mission to change your perception of the accounting industry as a whole.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchVancouver, BC, CanadaHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Business Law”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchLaval, QC, CanadaHQ recorded Nov 6, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 20261-103 contacts →

Exact match

“Blachford Tax Law represents individuals and businesses who are facing significant tax disputes with the Canada Revenue Agency.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchToronto, ON, CanadaHQ recorded Nov 6, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchScarborough, ON, CanadaHQ recorded Nov 6, 202611-503 contacts →

Exact match

“Why Choose MAK TAX?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchBurlington, ON, CanadaHQ recorded Nov 6, 20261-103 contacts →

Exact match

“Ummat Tax Law PC is a boutique firm founded with a singular mission: to deliver superior results for our clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchVancouver, BC, CanadaHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Tax and Business Law (Vancouver, BC)”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchToronto, CanadaHQ recorded Nov 6, 20261-102 contacts →

Exact match

“We do one thing - resolve tax disputes - and we do it well.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchToronto, ON, CanadaHQ recorded Nov 6, 20261-102 contacts →

Exact match

“KR Law Firm is a law practice based in Toronto, Canada, practicing in comprehensive tax services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchToronto, ON, CanadaHQ recorded Nov 6, 20261-101 contacts →

Exact match

“At Faris CPA, we believe in building strong client relationships.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 52 tax controversy services based in Canada

See the full list, filter by size, metro and specialty, and access 116 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Tax controversy services based in Canada at a glance

As of Nov 6, 2026
42.6%Verified-email coverage
5.2Average contacts per company
1-10Median size (employees)
25.0%Largest-city concentration · Toronto
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
41
11-50
11

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 52 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 controversy services” 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 116 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 November 6, 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.

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 controversy services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tax controversy services are there based in Canada?

RevenueBase identified 52 company matches for tax controversy services associated with Canada as of November 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?

Rosen & Associates TAX LAW tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most tax controversy services?

Toronto leads with 13 company records, followed by Calgary (4) and Montreal (4).

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 116 professional contacts with verified work emails tracked across these 52 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 November 6, 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.