Monday, November 9, 2026 · Customer reviews of US businesses
The Fair Hearing score
Excellent
44 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Long Island Tax Resolution Services specializes in providing affordable solutions to both individuals and small businesses experiencing back tax problems. These are either IRS tax problems or State tax problems.
Long Island Tax Resolution Services (longislandtaxresolution.com) has 44 customer reviews on The Fair Hearing, with an average rating of 4.9 out of 5.
Showing 43 reviews with 5 stars · Clear filters
Jim really helped me out a few years back. His knowledge of the tax codes is second to none. He saved me 30 to 40 times his fee which is amazing. It has been 4 years since he cleared my issues with the IRS and I've never heard from them again. That is a good thing!
By Anthony T.
James Grennen told me what to expect going in from the start. He said “The process takes time, so be patient and I will get you the results you are looking for.” Well, he delivered. My life has changed drastically since my case was resolved. I will absolutely recommend him to others. Thank you James!
By Kevin M.
A while ago we were in a jam. ( Wife & I) Garnishments, liens, even bankruptcy. We heard horror stories about those TV and bigger so called Tax Resolution companies. But we were desperate. I don’t remember what brought me to James Grennen of LI Tax Resolutions but we have absolutely no regrets. He has over exceeded our expectations. Over the years Jim has guided us and helped stay out of trouble. At this point we do call him a friend and look forward to his continuing services now and in the future. The IRS is ruthless and will stop at nothing to get what they want. So if you are on the IRS’s Radar. LI Tax Resolutions and James Grennen is the Radar jammer that you need. Just like myself. You won’t have any regrets.
By Joseph L.
James did a great job for me. He helped resolve a big problem quickly and efficiently. Highly recommended.
By Joseph P.
I was at the end of my rope trying to negotiate with the IRS. Tax liens, bank levies, wage garnishments & getting nowhere fast. I reached out to Jim and finally was able to reach a resolution and put it all behind me. Highly recommend!
By Donna Pisano S.
I am a bankruptcy attorney. When I consult a client with serious IRS or State tax debt, I immediately refer to James Grennen and only James Grennen. We often work together to eliminate tax debt or put it into a repayment plan. Highly recommended.
By John G.
Absolutely a pure professional. He took a terrible tax situation in my life and provide the advice, guidance and expertise to corrector all.
By Michael C.
When I received the notification from the IRS, my heart almost stopped. I couldn’t even function afterwards, I was scrambled and had no clue as to who to call. All I could hear from that moment on was annoying commercials about people being harassed by the IRS And how how they were enforcing repayment of owed money by garnering wages and bank accounts. I called James Brennan and setup and appointment and he made me totally at ease and walked me through the process to the very end successful and even answered my calls weeks later with a couple of questions I wasn’t sure about. I am COMPLETELY Satisfied with the service provided by James and wouldn’t hesitate to refer him to any and all that I know. Heath Zigler
By Heath Z.
