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Long Island Tax Resolution Services

4.944 reviews
Last reviewed: Feb 10, 2024

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longislandtaxresolution.comMember since Mar 2026

Long Island Tax Resolution Services is an online company. Based on 44 reviews on TrustPlane, it has an average rating of 4.9 out of 5 stars. Last reviewed February 10, 2024.

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Extremely professional, highly knowledgeable and focused on your individual and unique concerns.

I was recently widowed and unbeknownst to me, I inherited a voluminous collection of "Unpaid, Intent to Levy" notices from both the IRS and NYS. Upon receiving a recommendation from our long term and trusted accountant, I hesitantly contacted Mr. James Grennen and informed him of my plight. In a very professional manner, he quickly understood my unique needs and concerns and with a great deal of compassion, he formalized an individualized plan required to ease my fears and apprehension. His extensive experience in dealing with the governmental agencies involved was priceless and highly effective. I will be eternally grateful for his assistance and his concern and diligence regarding any obstacle encountered while resolving my "Tax Situation". Without any hesitation, I highly recommend this gentleman for any taxation issues or concerns that you may encounter in your life.Thank you again, Mr. Grennen.

JOAN ROMERO
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I was in trouble with the IRS mostly due to my own fear.

I was in trouble with the IRS mostly due to my being frozen by fear. I was in denial, paralyzed and didn't know where to turn. A steady stream of threatening letters were arriving in the mail and then the IRS garnished my wages. I had to do something. Then a friend told me about Long Island Tax Resolution Services. I called their number and found a sympathetic, calming, and very professional voice on the phone at Long Island Tax Resolution Service. My contact, James Grennen, listened to my situation, understood my very sophisticated and nuanced tax law issue and gave me hope that he could help resolve the perceived misunderstanding at the IRS. Mr.Grennen requested my tax records. Once my records were received Mr. Grennen asked clarifying questions. At the end of this process Mr. Grennen reiterated his opinion that my situation could be equitably resolved with the IRS and that he would get back in touch with me soon. We exchanged subsequent clarifying information on several different occasions and in due time the IRS garnishment was removed and the large balance that IRS was seeking from me was cancelled. Case Closed.

Carl
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Jim offered me solid

Jim offered me solid, comprehensive, as well as very reassuring guidance and advice during a very stressful financial experience. After just one initial phone call I felt like I could take a breath and trust him to guide me through it -- which he did. "Highly Recommend" falls short.

Mark
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When you're at the end of your rope…

When you're at the end of your rope with your tax returns, reach out and grab hold of one of the many lifelines that James Grennen has to offer. He is an honest,straight to the point kinda guy. Just when you think all hope is gone, James can show you different ways you can approach your particular situation and choose the one that will best suit you. And, he'll work with you until you're completely satisfied. He worked wonders for my family and me. So when you think 'there's no way out of this mess' or you just need an accountant that can get the job done for you...give James Grennen a call and put an end to your stress and worries.

Vinny Logi Lo Giudice
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James is very knowledgeable and has…

James is very knowledgeable and has many years dealing with the IRS with all types of cases. He continues to communicate all issues and how I have to respond back always with clarity and professionalism.We have been working together for Five years and highly recommend his services to everyone.

Kevin Shires
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James Grennen , A True Trustworthy Professional...

James Grennen, Tax Resolution Specialist, Is Professional , Intelligent & On-Point ...!! Jim Solved BOTH My Federal & State Tax Problems... I Was In Arrears Due To Health Issues ... Mr.Grennen Was A No-Nonsense, Yet Understanding Human Being ... His Knowledge Of The Rules & Regulations Of The United States Treasury & NYS Department Of Taxation & Finance Is Second To None ... He Explained What The Procedures Would Be & What Expectations I Should Have ... He Was Patient With Handling All Of My Questions ( And I Had ALOT ) ... He ( Himself ) Dealt Directly With The Feds & State ... My Total Balance Owed To The IRS Was Lessened By $25,000 ,Since I Was A First Time Offender..I Would Of Never Known This Could Be Done ,But Mr. Grennen Obviously Did ..!! He Set Up 2 Payment Plans For Me With Each Authority & They Were Manageable, Due To The Balances Being Lower Than If I Did Not Hire Long Island Tax Resolution Specialists ... I Believe Mr. Grennen Truly Had My Best Interest At Heart & Genuinely Was Happy For Me When All Of My Visits ,Phone Calls , E Mail & Texts Came To A End , When The Case Was Closed .... A+ For James Grennen & His Company..... Respectfully, Glenn A. Mauro

Glenn Mauro
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L.I. Tax Resolution Service is top/notch!

All I can say is “Thank God” I found Jim Grennen! Tax issues can be very alarming to say the least. I was overwhelmed and knew I needed help. Not only did I get the help I needed, but I got honest advice that helped saved me thousands of dollars! Mr. Grennen has been my go-to accountant for the last 4 years! He is reliable, answers calls, gives excellent feedback and guides you through a process that can be scary & costly. I highly recommend, you won’t be disappointed!

T.Janis
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Jim really helped me out a few years…

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!

Anthony Tuozzo
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Straight forward and honest

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!

Kevin Madden
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James Grennen is one of the Best at…

James Grennen is one of the Best at what he does. He’s an expert at Tax Resolution We had some issues with the IRS years ago almost filed for Bankruptcy, and James was able to Straighten everything out. He goes far and beyond to help his clients out. He is a very kind and caring Man. I highly recommend him.

Debbie Delgado
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You Won’t Find Anyone Better, anywhere else!

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.

Joseph Lopez
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Highly recommended

James did a great job for me. He helped resolve a big problem quickly and efficiently. Highly recommended.

Joseph Petrino
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I was at the end of my rope trying to…

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!

Donna Pisano Stovall
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I am a bankruptcy attorney

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.

John Gonzalez
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Absolutely a pure professional

Absolutely a pure professional. He took a terrible tax situation in my life and provide the advice, guidance and expertise to corrector all.

Michael Caruso
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When I received the notification from…James Brennan Long Island tax services

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

Heath Zigler
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I highly recommend Jim Grennan!

I highly recommend Jim Grennan as an accountant and for his tax resolution services. He’s extremely knowledgeable, patient and helpful. His direction and guidance is top notch. I’ve worked with Jim for years and he has always gone above and beyond. He truly cares.

Kendra S
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This man was so rude I did not even get…

This man was so rude I did not even get passed a brief phone consult!In my home my husband handled all bill's and anything to do with money matters. My husband died in a car accident very recently. I had to go through mail and bill's and in doing so found a huge tax debt. I figured i would seek help close to home. I reached out to Long Island tax resolution. He called me back. I began to explain my situation, but apparently I was speaking too much Immediately I noticed his aggitated demeanor and wanting to control the conversation. If I spoke more than 2 to 3 words he was shutting me down. I did not get a good feeling from his abrupt demeanor. But, I was in a desperate situation in just finding out and felt I needed help at the time.so I tried to proceed to see if he did not come off so controlling and maybe we could proceed forward but he only got ruder. I can't believe these raving reviews. In my experience this man was just rude to my situation and I could never hire someone so cold! And no I am.not a client but was looking for help but definitely did not feel comfortable with his disposition. I gave 1 star only because I would not have been able to proceed with a review so really I give no star!! Horrible! I just read their false and exaggerated response to cover up what really occurred which was my beginning to inform him of my husband's passing and of the tax problem I found out about. I was in no way what this person referred to as hysterical. I was merely beginning to try and convey my situation. He cut me off when I began to speak and then said he was going to ask a series of questions in which I agreed and said okay. When I gave an answer he felt my saying maybe 5 words was too long and got aggitated. He asked another question in which I responded yes but he did not hear my yes and asked again and I said I will repeat my answer again....yes. He became aggitated and he said we are not going to be able to work together and I agreed and added you are rude then I hung up. That's the real version. My experience was that he was not kind and spoke down to me Unfortunately in life you sometimes are in a situation rhat you need to reach out for help. You are at the mercy of people who know you are at a low in your life and instead of being sensitive they are rude. I do not need to associate with someone like him. I am proud of the way I have handled everything following my husband's sudden passing and will continue to do so and making my two daughter's proud. We will get through without any assistance from abrupt people!!!! 🙏🙏🙏

Carol Fisher
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So Relieved!

James Grennan is extremely knowledgable in his field. He is professional, honest and will fight for you! I highly recommend his tax resolution services!!! A great opportunity for a positive outcome!!!!

Ilene Edelson
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thank you!!!!

I called Jim Greenen to get help with my tax situation that was very complicated and he was very friendly and helpful. He took the time to explain what to do and I felt very relieved. I was given great guidance and direction. The support he provided me was greatly appreciated. Highly recomended!!!!

Peter S.
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According to TrustPlane, Long Island Tax Resolution Services has a 4.9/5 rating based on 44 verified reviews as of April 2026. Source: trustplane.app/company/longislandtaxresolution-com