Tax guide · Accounting and invoice operations

Advance and final invoices

Advance and final invoices must use one consistent contract and tax logic. Deposits, tax timing, prior invoice references and the remaining balance must not be duplicated or omitted.

01

What to verify

  • Original document and contractual supply context

  • Tax point, amounts, currency and corrections

  • Approval, export, retention and audit trail

02

Practical workflow

  1. 1

    Capture the decisive facts and select the correct jurisdiction and date.

  2. 2

    Resolve the time-valid rule and record its source, version and open questions.

  3. 3

    Align invoice, accounting, reporting and evidence; route uncertainty to review.

03

Worked example

A project is billed through two deposits. The final invoice shows total supply, credited deposits and the remaining amount without duplicating VAT.

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04

Common mistakes

  • !

    Automation without idempotency and audit evidence

  • !

    Correcting only the PDF but not the canonical data

  • !

    Treating uncertain extraction as approved tax data

05

Invoice and accounting impact

The result should be represented consistently in the invoice, structured data, accounting, reporting and evidence. If a decisive fact changes, the decision is recalculated and the previous version remains in the audit trail.

06

Legal basis and official sources

The page links to official primary sources. The actual decision is made by the versioned Dynafis rule set.