Top New York

Tax & Business

How much do you owe?
Get Started

Tax Law and Business Law

Since 1961, the tax lawyers at Mackay, Caswell & Callahan, P. C. have represented clients with respect to IRS tax audits, FBAR disclosures, the Offshore Voluntary Disclosure Program (OVDP) and other complex tax matters.

Who We Are

Mackay, Caswell & Callahan, P. C. is a professional corporation focused on Upstate New York tax controversies. Attorney Joe Callahan leads the tax group at Mackay, Caswell & Callahan and brings a high level of diverse tax experience to bear on behalf of our clients, from accounting to academia to IRS negotiations.

What We Do

Founded in 1961, we have a well-established reputation with the state and federal government tax communities and a comprehensive understanding of the internal workings of governmental tax agencies. We confidentially navigate tax agency procedures and avail our clients of all administrative and judicial remedies.

how we do it

Mackay, Caswell & Callahan handles all aspects of tax controversies including audit representation, collection defense, civil tax litigation, and criminal tax defense. We are committed to achieving the best results for our clients as efficiently as possible, with straight talk and effective solutions.

Trust Us

Our Rochester and Syracuse tax attorneys know that to successfully obtain tax relief for our clients, a tax attorney must take the time to gain a full understanding of the complexities of each client's tax issue.

Our business law practice offers counsel to public and private companies, lenders and financial institutions, business owners and shareholders.

  • Breach of contract
  • Selling businesses
  • Buying businesses
  • Probate services
  • Powers of attorney
  • Health care proxies
  • Business formation
  • Criminal tax investigations
  • Audits and collections

Practice Areas

New York Tax Lawyers

New York Tax Lawyers

NY and IRS tax audits, an IRS levy, tax lien, and innocent spouse relief all require representation from tax attorneys with years of experience. You need a tax attorney who can battle with the government on your behalf.

learn more
Business Lawyers

Business Lawyers

As a business law firm, our business lawyers work to minimize your company’s exposure to risk while maximizing the value of your investment. As a business owner, you must keep your company’s bottom line in mind at all times.

learn more

As seen on

Client reviews

How can I help you?

You can contact us using this form day or night, 24 hours a day, 7 days a week, 365 days a year. You will hear back from one of our attorneys the same day or next day.

If you would like to speak with a team member immediately, we are available 24/7 via this form — or via phone toll-free from 6am – 8pm EST M-F at: 844 - MCC - 4TAX


Albany tax attorney

Albany New York

90 South Swan Street, Suite 103B,
Albany, NY 12210

(518) 626-9060

Office Details
NYC Tax Attorney

New York City New York

10 East 39th Street, Suite 901
New York, NY 10016

(212) 281-6781

Office Details
Rochester tax attorney

Rochester New York

510 Clinton Square, #5163
Rochester, NY 14604

(585) 698-1200

Office Details
Syracuse tax attorney

Syracuse New York

6739 Myers Road,
East Syracuse, NY 13057

(315) 472-5201

Office Details

Utica New York

258 Genesee Street, Suite 602
Utica, NY 13502

(315) 478-4823

Office Details
Watertown business attorney

Watertown New York

215 Washington Street, Suite 8
Watertown, NY 13601

(315) 472-5202

Office Details

schedule an appointment with us

Call Toll Free
844 - MCC - 4TAX
send a message
Contact Us
send a message
Contact Us