About
Complex Consulting is a Boston-based tax consulting firm specializing in individual and business tax preparation, tax planning, and IRS and state tax resolution.
Our experienced team includes Enrolled Agents (EAs), Certified Tax Resolution Specialists (CTRSs), a Certified Internal Auditor (CIA), and an Actuary, bringing together a unique combination of tax, financial, analytical, and problem-solving expertise.
We go beyond simply preparing tax returns. We help individuals and businesses navigate complex tax situations, resolve tax liabilities, and develop practical strategies for their financial future.
At Complex Consulting, our goal is simple: provide knowledgeable guidance, personalized service, and effective solutions when taxes become complicated.
Our experienced team includes Enrolled Agents (EAs), Certified Tax Resolution Specialists (CTRSs), a Certified Internal Auditor (CIA), and an Actuary, bringing together a unique combination of tax, financial, analytical, and problem-solving expertise.
We go beyond simply preparing tax returns. We help individuals and businesses navigate complex tax situations, resolve tax liabilities, and develop practical strategies for their financial future.
At Complex Consulting, our goal is simple: provide knowledgeable guidance, personalized service, and effective solutions when taxes become complicated.
Tax Agencies Serviced
Federal Tax Agencies
- Internal Revenue Service
State Tax Agencies
- Massachusetts Department of Revenue
- Rhode Island Division of Taxation
- Connecticut Department of Revenue Services
- Maine Revenue Services
- New Hampshire Department of Revenue Administration
- New York State Department of Taxation
- Vermont Department of Taxes
- New Jersey Division of Taxation
- Georgia Department of Revenue
Tax Types Serviced
Corporate Tax
Excise Tax
Alcoholic Beverage Tax
Fisheries Related Taxes
Tobacco Tax
Oil & Gas Tax
Income Tax
Employment/Payroll Tax
State Sales & Use Tax
State Cannabis Tax
Gift Tax/GST Tax
Estate Tax (Form 706)
Estate & Trust Income Tax (Form 1041)
Taxpayer Types Serviced
Individuals
Sole Proprietor
Limited Liability Companies
S-Corporations
C-Corporations
Estates
Expatriates
Non-Profits/Charities
Partnerships/Multi-Member LLC
Reviews
Reviewed by
Sam O
Advised on Unpaid Taxes, Past Due Tax Return, Wage Garnishment, Unfiled Returns - No Balance, Tax Lien |
Apr 5, 2026
Reviewed by
Annonymous
Advised on Past Due Tax Return, Tax Penalties |
Mar 29, 2026
Team of Tax Professionals
Octavio Vieira
CIA, EA, CTRS -
Experienced Tax Resolution Specialist at Complex Consulting
3 Reviews
85 Reviews
Serving Nationwide
Boston, Massachusetts
21 Years of Experience
Speaks: English, Portuguese, Spanish