ChatGPT and Claude are powerful, but their tax answers come from training data. They fabricate section numbers, cite regulations that do not exist, and sound confident doing it. You cannot put that in a client file.
Checkpoint and CCH still charge enterprise rates for access to primary authority. Most small and mid-size firms are paying for more than they need, or going without.
Looking something up in one tool, verifying it in another, drafting the memo in a third. Every switch costs time you could be spending with clients.
Go to platform.bizora.ai, create an account, add credits, and generate a key. Fast Tax Research costs $0.24 per request; Deep Tax Research costs $1.50 per request.
In Claude, go to Settings > Customize > Add custom connector. Paste in https://mcp.api-bizora.ai/mcp and sign in with your Bizora account when prompted.
Open the tools menu in Claude and you will see tax-research listed. Ask anything. Claude calls Bizora automatically.
TWO WAYS TO USE BIZORA
Use Inside Claude
Ideal for practitioners
Add Bizora to Claude Desktop and ask tax questions the same way you would ask a senior associate. Answers come back with primary source citations you can trace and defend
Works inside Claude Desktop on Mac and PC
No coding experience needed
The tax-research tool activates automatically
Every answer includes source citations and metadata
$0.24–$1.50 per request, pay as you go
No installs required — connect from Claude's settings
Embed in Your Product
Ideal for developers
The Bizora API is OpenAI-compatible. Drop it into any application already talking to an AI model. Deep research, document analysis, and streaming in a single endpoint.
REST API with OpenAI-compatible interface
Real-time streaming responses
Deep multi-step research with reasoning trail
Document analysis and extraction
White-label ready
COVERAGE
Federal
Internal Revenue Code
Treasury Regulations (final, temporary, and proposed)
IRS Revenue Rulings and Procedures
IRS Notices and Announcements
Chief Counsel Advice
Tax Court and Federal Circuit case law
All 50 States
Statutes, regulations, and agency guidance
Nexus and apportionment rules
State conformity and non-conformity to federal provisions
International
GILTI, FDII, Subpart F, Section 245A
U.S. treaty networks
OECD Pillar Two frameworks
EU VAT rules
Cross-border M&A and inbound/outbound structuring
Deep Research Mode
Breaks complex multi-issue questions into sub-questions
Queries multiple authorities independently
Synthesizes findings with citations from each step
Every answer includes View Steps so you can trace the reasoning
COMPARISON
PRICING
Flexible subscriptions for tax professionals.