Document-backed tax context
The Tax Decision starts with an invoice or supporting document and combines extracted data with confirmed supply facts.
Global Tax Decision Engine
Upload an invoice. Classify the tax case. Preserve the evidence.
Dynafis extracts the relevant invoice data, adds the supply context and creates a versioned Tax Decision with an Evidence Passport.
Document-backedOSS / IOSSMarketplace TaxImport / ExportAudit Trail
Invoice / document ↓Extraction + confirmation ↓Versioned Rule Matrix ↓Tax Decision + evidence
Rule Matrix
OSS/IOSS, call-off stock, triangulation, chain transactions, dropshipping and deemed-supplier cases use prioritized, time-valid rules.
Evidence Passport
Every decision carries a document hash, rule/law/country versions, evidence, warnings and an audit trail.
1 · Document
Upload an invoice or supporting document
PDF, JPG, PNG or TXT · up to 15 MB. The file is processed for extraction; uncertain tax facts are never guessed.
3 · Result
Tax Decision
The tax decision appears here after upload and confirmation.
Tax guides
30 practical guides for businesses and accounting firms
Required invoice data, reverse charge, e-invoicing, VAT exemptions and cross-border cases – with official sources and direct links to the relevant Dynafis checks.
01 Invoice required fields for sole traders A sole-trader invoice needs identifiable parties, a unique invoice number, supply details, consistent totals and the VAT treatment required by the relevant jurisdiction. Business form alone does not replace transaction-specific checks.02 Invoice required fields for companies and SMEs A business invoice must combine the legal minimum with transaction-specific data needed by the buyer, tax reporting and the e-invoice profile. PDF, structured data and accounting entry should tell the same story.03 Invoice review workflow for accounting firms Accounting-firm validation should separate formal errors, tax risks and uncertain extraction. Every finding needs evidence, severity, a correction path and an auditable approval decision.04 Small-business VAT exemption check A small-business VAT exemption is not determined by one universal threshold. The relevant country, previous and current turnover, start date, excluded activities, opt-out and the EU cross-border SME scheme must be checked separately.05 Small-business VAT rules in the startup year The first year cannot be tested by inserting zero as previous-year turnover. The start date, expected annual activity, national pro-rating rules and excluded supplies must be resolved for the selected jurisdiction and date.06 Small-business VAT threshold exceeded Crossing a VAT-exemption threshold can have immediate or later effects depending on the country and rule version. Do not backdate or postpone VAT treatment without resolving the exact legal effect for the selected tax year.
API
Tax API for integrations
Batch decisions, country profiles and rule versions are available separately through the authenticated Tax API.