Overview
Tax research built for professional work.
General-purpose AI searches broadly and generates an answer. Marble Intelligence starts with authoritative tax sources. Every research question is grounded in a curated corpus of federal and 50-state primary authority maintained by tax professionals; including the Internal Revenue Code, Treasury Regulations, IRS guidance, and state tax law.
The result is more than an answer. You can inspect the authority behind every claim, analyze client documents against the law, and turn your research into work product - all without starting over in another tool.
50 States + Federal
Full Primary-Law Coverage
Citation Backed
by design, on every answer
Curated Sources
Secondary sources from experts
Try Marble Instantly - see how it answers complex tax research.

Research
Ask it the way you'd ask a colleague
Ask complex federal or state tax questions in plain English—including questions involving multiple jurisdictions, entities, or tax issues. Marble researches the relevant authority, reasons across sources, and gives you a clear answer with citations behind every material claim.
Instead of searching by keyword, opening tabs, and piecing together an answer yourself, you can start with the question you actually need answered.
Plain-English research
Ask the full tax question, not a collection of keywords.Multi-source reasoning
Marble researches across relevant authorities to build the answer.Every claim cited
Go directly from the analysis to the supporting authority.
Authority
Don’t just get the answer. Verify it.
Every material claim in a Marble research answer links back to the underlying authority. Open the citation to read the statute, regulation, ruling, or guidance in context—without leaving your research.
Marble also gives you direct access to its federal and state tax library, so you can search and browse primary law yourself whenever you want to go deeper.
- One-click citation verification, full text in context
- Searchable federal & state statutes, regulations, and guidance
- End-to-end traceability — essential when professional liability is on the line

Analysis
Research the law and the client’s documents together.
Upload tax notices, returns, agreements, workpapers, and other client documents directly into your research. Marble reads the documents alongside the relevant tax authority, helping you understand what’s important, identify issues, and answer questions using the client’s actual facts.
- Ask questions about uploaded documents
- Analyze client facts against tax authority
- Identify issues worth a closer look
- Keep source documents alongside the research

Work Product
Go from research to finished work.
Finding the answer is only part of the job. Turn Marble’s research into professional work product without starting from a blank page. Draft technical memos, client communications, and notice responses grounded in the research and authority you’ve already reviewed.
Technical research memos
Turn analysis into structured work product with supporting authority.Client communications
Translate technical conclusions into clear, client-ready explanations.Notice responses
Draft responses using the notice, client facts, and relevant tax authority.Built for review
Marble does the first pass. You review, edit, and apply your professional judgment.What used to take hours of validating sources, now takes minutes. The citations and reasoning give me confidence I can rely on the answer in real client work.
Marta GPartner, Tax Controversy
Everything you need to know about Marble
Marble is an AI-powered platform built for tax professionals and accounting firms. Research tax questions, manage client intake, analyze returns, and prepare tax work with intelligence and automation built into every step.
See what tax work looks like with Marble.
Start researching today or talk to our team about bringing Marble across your firm’s tax workflow.
