Welcome to Mac Tax ®

About Us

What differentiates Mac Tax ® from other CPA firms is that we are more than just a tax preperation firm. We strive to advise our clients on how to best use the tax code to their advantage. Whether you are making a personal or business decision, there is usually a tax efficient way to do so. In addition to being a strong advisory partner to our clients, we are also bringing digitalization to the old, boring accounting world.

We leverage the most up to date technology to make our client-accountant relationship, easier, faster and smarter. Our goal is to make tax and accounting easy for all of our clients. We strive to be their go-to advisor to help in all of their personal and business financial decisions.

Our Team

Justin Macari, CPA

Justin Macari attended Adelphi University (Garden City, NY) where he received his MBA and Accounting degrees. During his time at Adelphi he was on the cross country and track teams, and held several internship positions working on high net worth clients' individual tax returns. From there he began interning at PwC where he worked directly with businesses on preparing federal, state and foreign income tax returns.

He has worked on clients ranging from startups to companies doing over $500 million in revenue that went on to become publicly traded companies. Justin began working on building his business in May of 2020 with his first set of clients. He has been full time with Mac Tax ® Macari CPA P.C. since July 2021.

Justin's LinkedIn Profile:

Justin's Experience - Click to Expand


Melville, NY

Tax Senior Associate

July 2018 - July 2021

  • Prepared corporate, partnership and S-corporation tax returns for clients small to $500 million gross revenue
  • Direct relationship with clients
  • Prepared international, corporate and partnership filings
  • Prepared estimated tax payments

Bessemer Trust

Garden City, NY

Accounting Intern

August 2015 - December 2017

  • Prepared 1040 returns, inputting large payments
  • Utilized PDF and Excel work papers as well as Prosystem tax software

Grant Thornton

Audit Intern

June 2017 - August 2017

  • Audited financial statements to reconcile with inventory and client records

Frankel Loughran Starr-Vallone

Garden City, NY

Accounting Intern

January 2015 - April 2015

  • Served as preparer for tax returns on 1040's, 1041's and extensions for tax season
  • Utilized Go File Room and Go Systems as well as PDF and Excel work papers for tax returns