Guides, and only where we can back them.
A guide exists for a topic and a country only where the product itself would answer — which means following one into the product gets you the same answer rather than a refusal.
8 guides.
- 2 min
AI tax research evaluation checklist
Twelve checks to run on any AI tax research tool before a firm relies on it: sources, jurisdiction and year, refusals, review and the deliverable.
- Filing deadlinesAU2 min
Australia tax agent client onboarding checklist 2026
What a registered agent has to do by 31 October 2026 for a new client to be covered by the lodgment program, and what to collect before preparing the 2025–26 return.
Law as of 2026-10-10
- Filing deadlinesCA2 min
Canada corporate year-end tax checklist 2026
What to gather and check before a T2 return for a 2026 year-end: the filing date, the balance-due date, and the documents a reviewer needs to sign off.
Law as of 2026-10-10
- Cross-border and treaties2 min
Transfer pricing year-end documentation checklist 2026
What to have in place at year-end for each controlled transaction: the delineation, the functional analysis, the method and its reason, and the evidence a local file rests on.
- Filing deadlinesUK2 min
UK MTD quarterly update review checklist 2026
Who must use Making Tax Digital for Income Tax from April 2026, the quarterly update deadlines, and what to check before each update is sent.
Law as of 2026-10-10
- Filing deadlinesUS2 min
US tax filing deadlines (IRS)
The dates that matter for a federal individual return, what an extension actually extends, and the distinction that costs people money — filing late and paying late are two different penalties.
Law as of 2026-01-01
- Individual incomeUK3 min
UK income tax 2026/27: personal allowance and bands
The bands, the personal allowance and its taper, and the one thing that catches people out — this guide describes rest-of-UK rates, and Scotland is different.
Law as of 2026-04-06
- Recordkeeping2 min
How to Read a TaxOrch Tax Answer and Its Sources
Four fields decide what your interface is allowed to say, and one of them decides whether you may show a number at all. A short guide to reading a grounded answer before you build around it.
128 jurisdictions, 16 tax topics.
New guides are added regularly. For a country without a guide yet, the country page lists its taxes, rates and filing dates, each with its official source.
Everything here states what it does not cover.
A guide that applies to one country and one tax year says so at the top, and cites the section it relies on. Read one before you decide whether any of this is for you.
Decision support, not tax advice. A professional reviews before anything is filed.