Horizon Tax Group is a tax-only firm led by an Enrolled Agent, federally admitted to represent taxpayers before the IRS in all fifty states. Resolution, preparation, and long-range planning for situations that have stopped being simple.
Our Approach
"The IRS doesn't negotiate with confusion — and neither do we."
Horizon Tax Group is a boutique tax firm in Woodinville, Washington, built for clients with complex situations. We specialize exclusively in tax — resolution, preparation, and planning — and the practice is led by an Enrolled Agent, the federal credential that carries an unlimited right to represent you before the IRS. That depth is what generalist preparers are not equipped to offer.
Horizon Tax Group is led by Melissa Sanders, EA, an Enrolled Agent admitted to practice before the Internal Revenue Service, enrollment number 00172517-EA.
Enrolled Agent is a federal credential granted by the U.S. Department of the Treasury. It carries unlimited rights of representation before the IRS in all fifty states, which is why a Woodinville firm can take a case in any of them. Melissa is a member of the American Society of Tax Problem Solvers, a body devoted entirely to IRS representation.
What We Do
Whether you're facing the IRS, filing a complex return, or building a multi-year strategy, we bring the depth and the clarity.
Tax Resolution
When the IRS is involved, you need someone who is federally admitted to represent you and who knows exactly how the process works. From notices and audits to liens, levies and years of unfiled returns, we take the matter on directly.
Learn MoreTax Preparation
Beyond filing, we analyze your position with an eye toward what comes next. Individual, business, and multi-entity returns prepared with the depth of a specialist, not a seasonal preparer.
Learn MoreTax Planning
Proactive planning is where significant tax savings actually happen. We work with individuals and growing businesses to build forward-looking strategies aligned with your financial goals.
Learn MoreWho We Help
Not everyone needs a specialist. If your return is a W-2 and a standard deduction, software will serve you well and we will say so. These are the situations where it will not.
Payroll tax liabilities, an assessed balance across several years, or a revenue officer already assigned. High stakes, personal exposure through the Trust Fund Recovery Penalty, and no room for a preparer who has never dealt with Collections.
An S-corp, two LLCs, a partnership interest and a K-1 that arrives in September. Returns where the coordination between entities is the actual work, and where a mistake in one place surfaces in three.
Depreciation schedules, passive activity limits, real estate professional status, 1031 exchanges, cost segregation. Positions that are entirely defensible and entirely worth documenting properly before anyone asks.
Equity compensation, a practice or partnership stake, a reputation that makes a public tax problem expensive in ways the balance does not capture. Discretion is part of the engagement, not an add-on.
The situation that feels least survivable and is usually the most fixable. There is a defined procedural path out of it, it starts with compliance rather than negotiation, and no part of the first conversation involves being judged for the delay.
Why Horizon
An Enrolled Agent, enrollment number 00172517-EA, admitted to practice before the Internal Revenue Service. Unlimited rights of representation on any matter, at any level, in any state.
We specialize exclusively in tax. Not general accounting, not bookkeeping, not payroll. Every engagement is handled with the depth that true specialization provides.
Membership of the American Society of Tax Problem Solvers, a body that exists solely for IRS representation work. A general credential says we are qualified; this one says what we are qualified in.
Military service demands preparation for every contingency. We bring that mission-focused discipline to every tax situation: methodical, clear-eyed, and accountable.
No volume-driven churn. Every case receives expert oversight from start to finish, the kind of attention a large firm simply can't offer.
Based in Woodinville and working across Bothell, Kirkland and Redmond. Because Enrolled Agent licensure is federal, the same practice serves clients anywhere in the country.
How It Works
A confidential conversation to understand your situation in full — no judgment, no pressure. A clear-eyed assessment of where you stand.
Where the IRS is involved, a Form 2848 lets us speak to them directly and pull your account transcripts. We analyze returns, notices, financials and business records before recommending a path.
With a plan in place, we execute — whether filing, representing you before the IRS, or implementing a multi-year planning framework.
We see your matter through to conclusion and remain available for ongoing guidance, keeping your tax position protected year after year.
Client Testimonials
"I had ignored IRS notices for two years and didn't know where to start. Horizon Tax Group laid out exactly what was happening and handled the process from there. The anxiety was gone after the first call."
"Multiple LLCs, real estate, and a W-2 — my returns were complicated. They caught things my previous preparer missed and we saved significantly. Genuinely worth it."
"Came in at the end of the year with no plan and left with a multi-year tax strategy. Straightforward, no fluff — exactly what I needed."
Take the First Step
Schedule a confidential consultation. We'll assess your situation and give you a clear, honest picture of your options — including when the honest answer is that you don't need us.
