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50 states + DC. 27,987 rules. Federal + state. IRS + DOR. Instant answers.
Income Tax, Capital Gains, Crypto, Sales Tax, Corporate Tax, Estate Tax, Expat, Property Tax. Every state DOR manual and IRS publication encoded and searchable in seconds.
27,987 rules across 50 states + DC. Click any state to explore.
48 of 50 states + DC have deep coverage. AR, GA, MS coming soon.
50 state tax codes. 14,000+ local jurisdictions. Your clients need answers now.
Every state has its own income tax rates, brackets, deductions, and credits. 9 states have no income tax. 5 have no sales tax. Some have gross receipts taxes, franchise taxes, or commerce taxes. Researching multi-state clients means navigating 50 different DOR websites.
Post-Wayfair, every state sets its own economic nexus thresholds. Your e-commerce client selling into 30 states needs to know: where do they have nexus? What are the thresholds? Do they need to collect sales tax? The rules change every year.
IRC 280E denies deductions for cannabis businesses. Form 8949 for crypto requires lot-by-lot tracking. DeFi staking rewards, airdrops, wrapped tokens. Each creates federal AND state implications. Manual research across IRS pubs and state DOR guidance takes hours.
Federal AMT, state-level add-backs, SALT cap at $10K, bonus depreciation differences. Your client exercises ISOs and suddenly owes AMT. Does their state conform to federal? Do they allow SALT deductions? One wrong assumption and they overpay by thousands.
"I'm a freelancer in California earning $150K. I also have crypto gains and sell products to customers in Texas and New York. What are my federal and state obligations?"
Our AI receptionist asks clarifying questions: "What entity type?" "Estimated quarterly payments?" "Nexus in other states?" Then produces a structured BRIEF with the real objective.
The tree routes to IRC ss 1, 55 (AMT), Rev. Proc. 2024-40 (brackets), CA RTC ss 17041, TX Tax Code ss 171 (franchise tax). Multiple experts analyse in parallel. Response cites exact legislation.
You can. But it gets tax calculations wrong 58% of the time.
Source: Filed.com independent benchmark of AI tax accuracy, 2026
| ChatGPT | AITaxAdvise | |
|---|---|---|
| Tax calculation accuracy | ~42% | Multi-expert validated |
| 2025-26 tax rates & thresholds | Training cutoff | Verified knowledge base |
| UK Oct 2024 Budget changes | Doesn't know | CGT, BADR, NI, IHT changes built in |
| Multi-jurisdiction routing | Single prompt | 9 specialist agents |
| Remembers your tax situation | Session only | Persistent profile |
| Audit trail | None | Git-versioned |
| Legislation citations | Often hallucinated | Anchored to specific Acts |
| Crypto DeFi / staking / bridges | Vague guesses | Dedicated expert agent |
ChatGPT is great for many things. Tax calculations isn't one of them. We built specialist infrastructure specifically for tax.
Each agent specialises in one area of tax law across multiple jurisdictions.
IRC ss 1-1400, IRS Publications 17, 501, 505. Tax brackets, standard deduction, itemized deductions, SALT cap, QBI deduction ss 199A, earned income credit.
Federal 50 StatesLong-term vs short-term rates, NIIT 3.8%, AMT ss 55-59, ISO exercises, 1202 QSBS exclusion, opportunity zones ss 1400Z, installment sales ss 453.
Federal StateForm 8949 reporting, DeFi staking as ordinary income, airdrop taxation, wrapped tokens, bridge transactions, NFT creator royalties, Rev. Rul. 2023-14.
Federal StatePost-Wayfair economic nexus, marketplace facilitator rules, SaaS taxability, state-by-state thresholds, exemption certificates, local surtaxes.
45 States 14K+ LocalsC-Corp 21% flat, S-Corp pass-through, partnership K-1, GILTI, BEAT, 163(j) interest limitation, R&D credit ss 41, bonus depreciation, state apportionment.
Federal 50 StatesFEIE ss 911, foreign tax credit ss 901, FBAR, FATCA Form 8938, tax treaties, totalization agreements, state residency rules for US expats.
Federal TreatiesFederal $13.61M exemption (2024), portability, generation-skipping tax, annual gift exclusion $18K, state estate taxes in 12 states + DC, inheritance taxes.
Federal 17 States401(k), IRA, Roth conversions, RMDs, ss 72(t) early withdrawal, SEP-IRA, Solo 401(k), state taxation of retirement income, military pension exclusions.
Federal 50 Statesss 121 primary residence exclusion, 1031 exchanges, REIT taxation, rental income Schedule E, depreciation MACRS, state property tax, transfer taxes.
Federal 50 StatesPortugal, Netherlands, Switzerland, Australia, Canada, Japan
PT NL CH AU CA JPDeFi, staking, airdrops, cross-chain bridges. Every swap is a disposal. We calculate it all.
Self-employment tax, expenses, VAT thresholds, quarterly payments. Know your position before April.
UK in Dubai? US citizen in London? Residency tests, DTAs, FBAR. We handle multi-jurisdiction.
Corp tax, salary vs dividend, R&D credits, VAT. Understand your company's tax position.
AITaxAdvise is a tax research tool. We generate information, calculations, and analysis that you take to your accountant. Preparation, not replacement. Research, not regulated advice.
Your tax data protected at every step of the pipeline.
Every query passes through a dual-gate security filter before reaching our AI experts. Gate 1 blocks injection patterns. Gate 2 uses an independent AI judge to catch semantic attacks. Powered by A2A Infrastructure.
UK GDPR, EU GDPR, and CCPA compliant. Email verification required. Data retention policies. Right to erasure. DPO contactable at dpo@tyga.cloud. Essential cookies only.
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10 Jurisdictions, 5 Languages
One simple price per research session. No subscriptions, no hidden fees.
Each research session = one complete Q&A cycle, no matter how many expert agents analyse your question internally.
An accountant charges £150-300/hr for the same research.
Two paths to the same tax research API. Pick yours.
Sign up for a Pro account. Go to Dashboard > Integrations > Generate Key. Your key starts with atx_.
Multi-expert analysis with IRC and state statute citations. 1 credit per consultation. Full API reference
First session free. Then £24.99 per session. No subscription needed.
Tax information and calculations only. Not tax advice. Full disclaimer