Company lists · Data refreshed September 2026

Top 25 Tax dispute resolution firms worldwide

RevenueBase identified 2,942 company matches for tax dispute resolution firms worldwide as of September 2026 and tracks 22,093 professional contacts across them, including 8,301 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for tax dispute resolution firms worldwide, 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 September 22, 2026. Country and city lists for tax dispute resolution firms follow the table.

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 Sep 22, 2026 How this list was built
2,942Companies
22,093Contacts tracked
8,301Verified emails
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The 25 largest tax dispute resolution firms worldwide

Ranked by team size
Top 25 of 2,942 company matches for tax dispute resolution firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchDallas, TX, United StatesHQ recorded Sep 22, 20265,001-10,0006,089 contacts →

Exact match

“Ryan, an award-winning global tax services and software provider, is the largest Firm in the world dedicated exclusively to business taxes.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchCiudad De Mexico, MexicoHQ recorded Sep 22, 2026501-1,000683 contacts →

Exact match

“Chevez Ruiz Zamarripa, es una firma especializada en la Asesoría y Consultoría Fiscal de alto nivel, que se distingue por prestar servicios personalizados con total…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchSanta Ana, CA, United StatesHQ recorded Sep 22, 2026501-1,000407 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchExton, PA, United StatesHQ recorded Sep 22, 2026501-1,000364 contacts →

Exact match

“Cohesive is a leading solutions provider and systems integrator for IBM Maximo.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchIrvine, CA, United StatesHQ recorded Sep 22, 20261,001-5,000297 contacts →

Exact match

“We help people with tax debt, wage garnishments, bank levies, audits and much more.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchDallas, TX, United StatesHQ recorded Sep 22, 2026201-500224 contacts →

Exact match

“In operation since 1978, KE Andrews is one of the largest state and local tax firms in the country, managing over $500 billion in assets.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchJacksonville, FL, United StatesHQ recorded Sep 22, 2026201-500175 contacts →

Exact match

“Since 2010, Community Tax has helped individuals and businesses across the United States navigate complex tax matters with clarity and confidence.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchIrvine, CA, United StatesHQ recorded Sep 22, 2026201-500138 contacts →

Exact match

“We care about people.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchJacksonville, FL, United StatesHQ recorded Sep 22, 2026201-500134 contacts →

Exact match

“Since 2007, Tax Defense Network's team of licensed tax professionals has helped hundreds of thousands of taxpayers and small business owners resolve their IRS issues, including…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchBroomfield, CO, United StatesHQ recorded Sep 22, 202651-200131 contacts →

Exact match

“Your tax debt resolution partner.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchFolsom, CA, United StatesHQ recorded Sep 22, 2026201-500130 contacts →

Exact match

“TaxAudit.com is brought to you by the audit experts at TaxResources, Inc.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchLos Angeles, CA, United StatesHQ recorded Sep 22, 202651-200124 contacts →

Exact match

“Anthem Tax Services (ATS) is one of the highest rated Tax Resolution Companies in the U.S, comprised of professionals who are passionate about representing taxpayers and fighting…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchGoiania, BrazilHQ recorded Sep 22, 202651-200121 contacts →

Exact match

“A KBL Accounting foi fundada em 2007, oferecendo soluções nas áreas de contabilidade empresarial e assessoria jurídica tributária.Atualmente, atendemos clientes do segmento…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchWinston Salem, NC, United StatesHQ recorded Sep 22, 202651-200110 contacts →

Exact match

“Protection Plus provides top-tier tax resolution services, offering up to in services to resolve IRS notices, inquiries, and audits.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchBroomfield, CO, United StatesHQ recorded Sep 22, 202651-20091 contacts →

Exact match

“Over the past 28 years, 20/20 Tax Resolution has helped over businesses and individuals reach successful resolutions with their IRS and state tax liabilities.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchPlano, TX, United StatesHQ recorded Sep 22, 202651-20088 contacts →

Exact match

“Ryan Law is headquartered in Plano, Texas, with offices across the United States and Canada.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchValley Stream, NY, United StatesHQ recorded Sep 22, 202651-20078 contacts →

Exact match

“Tax Consulting Services Individual Tax Return Preparation * Electronic Filing * Refund Anticipation Loans * Same Day Refund Anticipation Loans * Refund Anticipation Checks * State…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchNorman, OK, United StatesHQ recorded Sep 22, 202651-20076 contacts →

Exact match

“We are one of the largest tax resolution law firms in the nation.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchSunrise, FL, United StatesHQ recorded Sep 22, 202651-20070 contacts →

Exact match

“Neil Jesani Tax Advisors, Inc.(NJA) provides a full suite of tax, compliance, accounting, resolution and advisory services, drawing on extensive industry knowledge to serve high…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchCosta Mesa, CA, United StatesHQ recorded Sep 22, 202651-20069 contacts →

Exact match

“Ideal Tax Solution (ITS) was established with the ideal of helping clients who are suffering through a tax debt issue, easing the stress and anxiety that comes with serious tax…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21Exact matchSao Paulo, BrazilHQ recorded Sep 22, 202651-20068 contacts →

Exact match

“Reduza sua carga tributária e seu passivo fiscal.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchMumbai, IndiaHQ recorded Sep 22, 202611-5065 contacts →

Exact match

“Aurtus is a full-service tax, transaction and regulatory advisory firm that provides practical, well-researched solutions to complex tax, transaction, and regulatory challenges…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchSpokane, WA, United StatesHQ recorded Sep 22, 2026201-50064 contacts →

Exact match

“Protecting Finances Leading Tax Debt Relief Experts | IRS & State Resolution Specialists Settle Tax Debt & Regain Stability We help individuals and businesses navigate complex tax…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchVero Beach, FL, United StatesHQ recorded Sep 22, 202651-20062 contacts →

Exact match

“At Omni Tax Help, we provide expert, personalized solutions to resolve tax challenges for individuals and businesses nationwide.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25Exact matchSantiago, ChileHQ recorded Sep 22, 202651-20059 contacts →

Exact match

“Somos un estudio moderno y eficiente, con reconocido liderazgo nacional e internacional en la práctica tributaria y de negocios.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 2,942 tax dispute resolution firms worldwide

See the full list, filter by size, metro and specialty, and access 8,301 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Tax dispute resolution firms worldwide at a glance

As of Sep 22, 2026
37.6%Verified-email coverage
7.5Average contacts per company
1-10Median size (employees)
2.0%Largest-city concentration · Sao Paulo
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
2,037
11-50
723
51-200
115
201-500
21
501-1,000
6
1,001-5,000
1
5,001-10,000
1
10001+
3

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for tax dispute resolution firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “tax dispute resolution firms” 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. 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 8,301 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 September 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 dispute resolution firms by location

14 lists · largest first

Every Tax dispute resolution firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 dispute resolution firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tax dispute resolution firms are there worldwide?

RevenueBase identified 2,942 company matches for tax dispute resolution firms worldwide as of September 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?

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

Which country has the most tax dispute resolution firms?

The United States leads with 1,350 companies, followed by Brazil (212) and Germany (178). Every tax dispute resolution firms list by country and city is linked on this page.

Which city has the most tax dispute resolution firms?

Sao Paulo leads with 58 company records, followed by Houston (47) and Los Angeles (37).

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 8,301 professional contacts with verified work emails tracked across these 2,942 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 September 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.