Built for the practitioners who serve
Tax research is split across five silos that don’t talk to each other
Statutes, regulations, opinions, IRS guidance, and legislative history each live in their own tool. Practitioners burn hours stitching them together by hand on every engagement.
Bloomberg Tax
Comprehensive content; terrible search and a non-responsive interface that punishes anyone working off a tablet.
Checkpoint
Broken homepage layout, unusable on smaller screens, and search ranking that buries the authority you actually want.
Legislative history
So painful with every commercial tool that Big-4 librarians track it in hand-built Word documents with hyperlinks.
One platform. Every authority. Linked, searchable, current.
We use the IRC section as the primary key linking every authority. Open ยง 162 and see the regs, the cases that interpret it, the IRS guidance issued under it, and the legislative history of every amendment.
U.S. Code & 26 CFR
Title 26 and Treasury regulations side-by-side with cross-referenced cases and guidance. Browse by section, jump by citation.
Cases & IRS guidance
Tax-court, district, circuit, and Supreme Court opinions linked to the statutes they cite. PLRs, Treasury decisions, and IRBs in the same surface.
Legislative history
Bills, public laws, committee reports, and amendments threaded back to the section they amend. The workflow Big-4 librarians have been begging for.
How TaxBook works
Open a section. Walk the citation graph. Pin the version. Done.
Open any authority
Type a section, citation, or natural-language query. Hybrid search returns lexical hits across all eight doc types in ~125 ms.
Walk the citation graph
Every doc opens with its related authorities pre-computed in the sidebar. Click to follow; click back to retrace. No tabs explosion.
Pin to a date
Reconstruct what the law actually said when your transaction closed. Time Machine works across USC, CFR, and the legislative timeline.
“Pulling legislative history used to be a librarian-assisted, multi-day project. TaxBook gives it to me in three clicks.”
Tax partner, AmLaw 50 firm
Ready to research without friction?
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