We Are Micro
Official Sources
Primary government, tax-authority, registry, European Commission and OECD sources used across We Are Micro guides.
Primary sources used across the guide library
We Are Micro links directly to official registries, tax authorities, government business portals, European Commission resources and OECD material. These are starting points, not a substitute for checking the exact domestic rule, treaty, guidance version or filing instruction that applies to your facts.
- Companies House — Incorporation and names
- Estonia e-Residency — Start a company
- European Commission — VAT One Stop Shop
- European Commission — VAT rules for small enterprises
- GOV.UK — Set up a private limited company
- IRS — Instructions for Form 5472
- Ireland CRO — Company types
- Irish Revenue — Company residency rules
- OECD — Permanent establishment provisions
- OECD — Tax treaties
- Singapore ACRA — Registering a business
- Singapore IRAS — Tax residency of a company
- U.S. Small Business Administration — Choose a business structure
- UAE Federal Tax Authority — Corporate Tax
- UAE Federal Tax Authority — Free Zone Persons guidance
How to use an official source well
Check the publication or update date, whether the page applies to residents or non-residents, whether it is law or explanatory guidance, and whether a more specific form instruction or treaty article controls your case. Save a dated copy of important guidance when you implement a structure so you can document what you relied on.
Rules change. A source link can remain live while thresholds, forms, eligibility conditions or interpretations change. Re-check the source immediately before a filing, incorporation or relocation.