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Trusted Accounting Services in Northbrook, IL
Mandell Advisory Group is a full-service Certified Public Accounting firm dedicated to providing comprehensive financial solutions for individuals and businesses. With decades of combined experience, our team of CPAs specializes in tax planning, accounting, and advisory services tailored to meet the unique needs of clients across industries. We prioritize personalized service, leveraging deep expertise in areas such as real estate transactions, international tax matters, and IRS audit representation.

Our commitment to excellence is reflected in our proactive approach to resolving complex financial challenges, including estate planning, QuickBooks support, and elder care services. By combining technical proficiency with a client-centric philosophy, we empower clients to achieve financial clarity and long-term success. Our firms foundation in ethical practices and continuous education ensures clients receive forward-thinking strategies aligned with evolving regulatory landscapes.
Services
Tax Preparation Estate Planning Small Business Accounting QuickBooks Services Payroll Processing Audits & Reviews Tax Planning IRS Audit Representation Financial Planning Elder Care Services
Highlights and features
  • Our team includes CPAs with decades of experience in tax and accounting services.
  • We specialize in resolving IRS and state tax audit issues efficiently.
  • We offer tailored QuickBooks setup, training, and support for small businesses.
  • Our estate planning services address complex multi-state and international tax needs.
  • We provide personalized financial strategies for real estate transactions and startups.
Services
Tax Preparation
Our tax preparation services ensure accurate and timely filing of individual and business tax returns. We maximize deductions while maintaining compliance with federal and state regulations. Clients receive strategic guidance to minimize tax liabilities and avoid penalties.
Estate Planning
We create customized estate plans including wills, trusts, and probate strategies. Our focus is on asset protection, tax efficiency, and ensuring client wishes are honored through structured legacy planning solutions.
Small Business Accounting
We handle monthly or quarterly accounting tasks including bank reconciliation, financial statements, and general ledger maintenance. Our services provide business owners with clear financial insights to support informed decision-making.
IRS Audit Representation
Our team advocates for clients during IRS audits, ensuring proper documentation and compliance. We negotiate settlements and develop strategies to resolve tax disputes while protecting client interests.
QuickBooks Services
We offer QuickBooks setup, training, and troubleshooting to streamline financial management. Our support helps businesses maintain accurate records and leverage software features for operational efficiency.
People
Mark R. Mandell
Founder, CPA, MST
Mark Mandell specializes in tax planning for real estate and international transactions. With prior roles at RSM McGladrey and DePaul University, he brings strategic expertise in complex tax matters and business consulting.
Andrew Hahm
Co-Founder, CPA, MST
Andrew Hahm has 20+ years of experience in tax and accounting services for small businesses and real estate professionals. He focuses on personalized solutions for startups, partnerships, and international tax compliance.
Richard Goodman
CPA, JD
Richard Goodman combines accounting and legal expertise to address complex tax and business law issues. He provides integrated solutions for corporate transactions and regulatory compliance.
Judi Quedenfeld
CPA
Judi Quedenfeld delivers tax compliance and advisory services for individuals and businesses. Her focus areas include multi-state tax reporting and strategic financial planning for high-net-worth clients.
Yujin Gaydosh
CPA
Yujin Gaydosh specializes in corporate and international tax matters. She assists clients with cross-border transactions, compliance, and optimizing tax structures for global business operations.
Questions
What accounting services do you offer for small businesses?
We provide bookkeeping, bank reconciliation, financial statement preparation, and unlimited consultations to help small businesses manage their finances effectively.
Can you assist with IRS tax problems?
Yes, we specialize in resolving IRS audits, back taxes, wage garnishments, and offer-in-compromise solutions to alleviate tax debt burdens.
Do you offer QuickBooks support for businesses?
We provide QuickBooks setup, training, troubleshooting, and tune-ups to ensure accurate financial tracking for small to mid-sized businesses.
What estate planning services are available?
Our services include wills, trusts, tax planning, probate avoidance strategies, and legacy planning to protect assets for future generations.
How do you support elder care financial needs?
We assist with budgeting, bill payment, retirement account management, and tax planning to help elderly clients maintain financial independence.
Are your consultations free?
Yes, we offer complimentary initial consultations to discuss your accounting, tax, or financial planning needs.