Business Details
39 Years
experience
Trusted Tax Services in Ossining, NY
AG Tax Services has been providing expert tax and accounting solutions since 1987. Founded by Allan Grossbach, a former federal tax auditor and IRS corporate field agent, our firm combines decades of hands-on experience with deep technical expertise. Allan's son Michael joined the practice in 2003 after earning dual degrees in Economics and Business Administration, becoming a partner in 2007. Both father and son hold IRS Enrolled Agent licenses, granting them the highest level of federal tax representation authority. We specialize in corporate and individual income tax returns, estate tax planning, payroll tax compliance, and audit representation.Our personalized approach ensures clients receive tailored solutions that address their unique financial situations. With over 35 years of continuous service to Westchester County businesses and residents, we maintain a strong reputation for accuracy, reliability, and exceptional client support. Our team's extensive experience navigating complex tax codes allows clients to focus on their priorities while we handle their tax obligations with precision and care.
Services
Corporate Income Tax
Individual Income Tax
Estate Tax Planning
Payroll Tax Returns
Audit Representation
Bookkeeping Services
Details
- Year established: 1987
Highlights and features
- We offer 35+ years of combined IRS and tax audit experience
- Our father-son team provides personalized, multi-generational expertise
- We hold IRS Enrolled Agent licenses for federal tax representation
- We specialize in complex tax situations and audit defense
- Our services combine technical precision with client-focused communication
Associations and certifications
- IRS Enrolled Agent
Services
Corporate Income Tax
We prepare and file comprehensive corporate income tax returns for businesses of all sizes. Our experts ensure compliance with federal and state regulations while identifying legitimate deductions. Clients receive detailed explanations of tax implications and strategic planning opportunities.
Individual Income Tax
Our personalized income tax preparation covers all individual circumstances including investments, property ownership, and self-employment. We maximize refunds while maintaining strict compliance. Clients receive clear documentation and year-round tax planning guidance.
Estate Tax Planning
We develop customized estate tax strategies to preserve wealth across generations. Our planning considers current exemptions, gifting strategies, and trust structures. We help clients navigate complex transfer tax regulations with practical, long-term solutions.
Audit Representation
Our IRS Enrolled Agents provide full audit representation for federal and state examinations. We handle all communication, documentation, and negotiations with tax authorities. Our proactive approach minimizes liabilities while protecting client interests throughout the audit process.
Bookkeeping Services
We maintain accurate financial records for businesses using modern accounting systems. Our services include payroll processing, sales tax reporting, and financial statement preparation. Clients receive timely, organized records that support informed business decisions.
People
Allan Grossbach
Founder
Allan established AG Tax Services in 1987 after 10 years as a federal tax auditor and IRS corporate field agent. His extensive experience navigating complex tax codes provides the foundation for our firm's expertise in tax compliance and strategy.
Michael Grossbach
Partner
Michael joined AG Tax Services in 2003 after earning dual degrees in Economics and Business Administration. As an IRS Enrolled Agent since 2007, he specializes in audit representation and corporate tax strategy while maintaining the firm's commitment to personalized service.
Questions
What tax services do you offer?
We provide corporate and individual income tax returns, estate tax planning, payroll tax compliance, audit representation, and bookkeeping services.
How do I schedule an appointment?
Contact us at 914-591-7195 during our business hours Monday-Friday 9am-5pm to schedule a consultation.
Can you represent me during an IRS audit?
Yes, both our professionals hold IRS Enrolled Agent licenses, allowing full representation before the IRS and Tax Courts.
Do you handle state tax filings?
We prepare both federal and New York State tax returns for individuals and businesses.
What experience do you have with complex tax situations?
With 35+ years combined experience including IRS field work and audit defense, we specialize in resolving complex tax matters.
Reviews (4)
Michelle Wixon
Apr 03, 2021
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Positive:Professionalism,Quality,Responsiveness,Value
We've been going to Mike now for 4 years now. No complaints. Thank you. I 100% agree and can relate with all the other compliments on here.
We've been going to Mike now for 4 years now. No complaints. Thank you. I 100% agree and can relate with all the other compliments on here.
Eric Tejeda
Aug 09, 2020
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Michael Grossbach cares for his customers. He knows how to handle situations and controls the tax process to the best of his ability. No other tax firm comes close! 4+ years with Michael and zero regrets. Thanks to Michael and staff for always providing excellent service. 5 STARS.
Jj Smith
Jan 26, 2019
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I would give zero stars if possible, stay AWAY from Michael and his team is possible, they are super money minded and try to get additional money out of you at each step, and once they have all your details, if you don't agree to pay their terms, he will threaten you with collection agency bills so you have to pay him....he hoodwinked me into a full tax charge after an initial consult (which i was happy to pay for) and was very rude and abrupt over the phone. I would stay away from them as the reason I didn't want to file with them after the consult was that some of his suggestions sounded quite
Alice Herde
Sep 06, 2016
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This is my second year with AG Tax Services. I love Michael and his staff. They are so efficient, knowledgeable and friendly. I won't go anywhere else. You have a customer for LIFE !!
