Home About For Vendors For Firms Contact Blog ↗ Book a Discovery Call
Tax Tech Advisory
Workflows that work.

Tax tech advisory, built from 15 years inside the profession.

I'm Yani Marx — CPA, former Top 20 firm partner, and the person AI companies and accounting firms call when they need someone who actually understands how the work gets done.

15+
yrs public accounting
27+
platforms hands-on
Top 20
firm experience
Active
CPA practice
Two audiences · one perspective
Which world do you live in?
01 · Builders

I'm building tax software

You need a CPA who can validate your workflows, catch edge cases, and bring practitioner credibility to your product and go-to-market.

For vendors
02 · Practitioners

I'm adopting new software at my firm

You need someone who speaks both languages — the technology and the practice — to make your platform switch actually stick.

For accounting firms
Why work with me
The gap I sit in.

I'm not a coder. I'm not an AI builder. I'm a CPA who has spent 15+ years in public accounting — including time as a partner at a Top 20 firm — and who never stopped paying attention to the technology side.

That's the gap TaxStackIQ sits in: the person who understands how firms actually operate, what workflows really look like under client pressure, and where new tools can step in without breaking what's already working.

Read my full story →

Let's scope your engagement.

20 minutes. No pitch. Just a conversation about whether I can help.

Book a discovery call →
About · Yani Marx, CPA

15 years inside the profession. A new way to apply it.

The story behind TaxStackIQ — why I started it, who I help, and the perspective I bring that you can't buy off the shelf.

Yani Marx, CPA
Why work with me
The double-major I almost did.

I almost double-majored in accounting and information systems 20 years ago. I chose tax — but the technology side never left me.

For 15 years I built a career in public accounting, eventually as a partner at a Top 20 firm. I sat close to the technology decisions but rarely got to make them. When I co-founded my own practice, picking the stack was one of the things I was most excited about. Then AI changed the conversation entirely.

What I realized is this: the firms that win the next decade won't be the ones with the flashiest tools. They'll be the ones that picked the right tools for their workflow, integrated them properly, and managed the change well enough that their teams actually used them.

That's harder than it sounds. I've watched large firms lose millions in revenue because the technology was right but the change management wasn't. I've watched small firms buy software that solved one problem and created three new ones. Over 15 years across both enterprise and closely held environments, I've learned what actually holds up under real client pressure — and what doesn't.

I'm not a coder. I'm not an AI builder. I'm the person who understands how firms actually operate, what the workflows really look like, and where new tools can step in without breaking what's already working.

That's the gap TaxStackIQ sits in.

The approach
Three principles guide everything.
Principle 01

Accounting first.

Process design starts with how the work really gets done — not how a vendor thinks it should.

Principle 02

Workflows that work.

The goal isn't more tools. It's the right tools, integrated properly, used consistently.

Principle 03

Change is where savings live.

Buy-in matters more than features. I've seen firms lose millions to bad change management.

Background · credentials

The experience behind the work.

01
Credential
CPA · 15+ years in public accounting
Licensed and active. Two decades of compounding reps in tax, accounting, and advisory.
02
Experience
Former Partner · Top 20 firm
Currently Partner at KSZ Advisors LLC. Both sides of the chair — enterprise and closely held.
03
Specialties
Real estate · HNW · closely held
Including real estate funds, owner-operators, and investor businesses.

Want to work together?

Start with a conversation. 20 minutes, no pitch.

Book a discovery call →
For Vendors · Tax tech & AI companies

Your engineers can't test what they've never lived.

I bring CPA-level expertise into your product process — before your customers find the gaps. Accounting-first perspective on workflow, validation, and go-to-market credibility.

The gap
Between building and practicing.
Your product works in the demo. But when a CPA with three multi-state clients, a trust, and an extension deadline tries to use it during busy season? That's when the gaps show up. I help you find them first.
Service 01

Product Validation & CPA Advisory

Product feedback from a real CPA perspective. I tell you what accountants will trust, where they'll hesitate, and where the friction lives — before your customers find it. Works as a recurring engagement or project-based review.

Workflow validationBeta testingEdge-case reviewUse case development
Service 02

Workflow Engineering & Process Design

The deeper engagement. I sit close to your product team and bring the accounting-first perspective on how the work should flow — mapping real-world workflows, identifying integration gaps, and shaping feature priorities based on actual firm pain points.

Workflow mappingFeature prioritizationIntegration gapsEmbedded advisory
Service 03

Accounting SME & GTM Credibility

Need a real CPA to lead webinars for your users, make your demo credible, or put a name behind your thought leadership? 15+ years of hands-on experience — on your timeline, for your specific need.

Product webinarsWhite papersSales demosConference speaking
What partners are saying
In their words.
"

[Testimonial coming soon — quote from a tax tech founder or product leader about working with TaxStackIQ on validation, workflow design, or accounting SME advisory.]

[Name]
[Title · Company]
"

[Testimonial coming soon — quote from a tax tech founder or product leader about working with TaxStackIQ on validation, workflow design, or accounting SME advisory.]

[Name]
[Title · Company]

Let's scope your engagement.

No pricing on the website — every engagement is scoped to your needs.

Book a discovery call →
For Firms · Accounting practices

Choosing tools is 20% of the work. Adoption is the other 80%.

I help accounting firms choose the right stack, build the workflows, and bring your team along — so the investment actually pays off.

The implementation gap
Right software, wrong rollout.
Your firm bought the right software. The demos were impressive. Leadership was on board. Six months later, half the team is using the old system. The problem isn't the technology — it's that nobody mapped it to how your firm actually works.
Service 01

Tech Stack Assessment & Strategy

Full assessment of your current stack, workflows, and pain points. Vendor evaluation and recommendations based on your actual needs — not the loudest marketing. Custom roadmap prioritized by impact and effort, with honest answers on what to adopt now, what to wait on, and what to skip entirely.

Stack auditVendor evaluationRoadmapHonest recommendations
Service 02

Implementation & Change Management

The piece most firms get wrong. Hands-on implementation from kickoff through adoption. Workflow redesign so new tools fit your firm — not the other way around. Team training and change management built around how people actually learn new systems.

Workflow redesignStaff trainingGo-live supportPost-launch optimization

Top 20 + closely held — both sides of the chair

Most implementation consultants know one world. I've lived in both. At a Top 20 firm, I navigated enterprise-level platform changes with complex approval chains and hundreds of users. At a closely held practice, I'm the one doing the migration, training, and troubleshooting — all while serving clients. That range matters because every firm's implementation is different.

27+ platforms · hands-on
The stack, lived end-to-end
CCH AxcessCCH EngagementGoSystemsFiledMagneticAcaciaTaxGPTGustoQBO PayrollTaxbanditsPingTallyforQBOQB DesktopDoubleStripeDigitsLoomMicrosoft 365Google WorkspaceXCMGoFileRoomSureprepTrussKarbonTaxDome+ more
Engagement models
Three ways to work together.
Model 01

Project-based

Defined scope, defined deliverable, defined timeline. Best for assessments, evaluations, and discrete implementation work.

Model 02

Retainer

Monthly engagement with a set number of hours. Best for ongoing advisory or firms partway through a longer transition.

Model 03

Workshops & training

Half-day or full-day sessions for your team. Best for firm-wide training or platform launches.

Pricing is engagement-specific. Let's start with a conversation about what you actually need.

What firms are saying
In their words.
"

[Testimonial coming soon — quote from a firm partner or operations lead about working with TaxStackIQ on stack assessment, implementation, or change management.]

[Name]
[Title · Firm]
"

[Testimonial coming soon — quote from a firm partner or operations lead about working with TaxStackIQ on stack assessment, implementation, or change management.]

[Name]
[Title · Firm]

Every engagement is scoped to your firm.

Let's talk about your transition. 20 minutes.

Book a discovery call →
TaxStackIQ · Get in touch

Let's talk.

Whether you're evaluating a platform, planning an implementation, or scoping a product validation engagement — reach out and let's figure out if we're a fit.

Yani Marx, CPA
Yani Marx, CPA
Founder · TaxStackIQ

15+ years in public accounting across Top 20 and closely held firms. CPA with hands-on experience across 27+ tax and accounting platforms. Accounting-first perspective on process design.

Book a call
Schedule a discovery call →
Email
[email protected]
LinkedIn
Yani Marx, CPA
Response time
Typically within one business day. For urgent matters, call or text directly.
TaxStackIQ · Legal

Privacy Policy

Effective Date: April 2026 · Last Updated: April 2026

TaxStackIQ · Legal

Terms of Use

Effective Date: April 2026 · Last Updated: April 2026