Tax Compliance under German §146a AO
Audit-proof for German tax inspections.
DSFinV-K is the official tax data export format required by German tax auditors during unannounced cash audits (Kassennachschau). Merkuron generates it as a ZIP archive in one click — without support tickets, waiting periods, or extra fees.
Instant DSFinV-K Export without vendor requests
When a tax auditor arrives unannounced, speed matters. Under §146b AO of the German Tax Code, auditors have the right to request an immediate export of all register data in the standardized DSFinV-K format. Merkuron built this export directly into the core app.
Standardized Data Structure
Includes all master data, transactions, TSE cryptographic signatures, daily closes, and payment types structured according to official tax authority specifications (DSFinV-K Version 2.3).
ZIP Archive Direct from Register
Export any date range directly from the POS interface or backoffice panel to a USB drive or local download. No technician or paid support request needed.
Validated against Tax Audit Software
Export files comply strictly with DSFinV-K specifications and pass official tax audit validation software (IDEA) without schema errors or missing links.
Certified Technical Security System (TSE)
Under the German KassenSichV regulation, every electronic recording system must incorporate a certified TSE module (§146a AO). Merkuron integrates certified TSE providers seamlessly into checkout workflows.
Flexible Provider Architecture
Supports cloud-based TSE services (such as fiskaly) and hardware TSE modules via an integrated backend provider factory architecture.
Cryptographic Receipt Signatures
Every transaction is cryptographically signed before printing, recording signature counters, security module serial IDs, and exact start/end timestamps.
Verification QR Code on Receipts
Receipt issuance requirements (§17 UStG) are fulfilled either via thermal paper prints or digital QR codes scanned directly by customers on their smartphones.
GoBD, 10-Year Archiving & Failover
German GoBD standards impose rigorous rules for electronic book-keeping, auditability, and tamper-proof storage across all business operations.
10-Year Immutable Archiving
Under §147 AO, all sales records must be stored immutably for 10 years. Voids or edits generate corrective audit records without overwriting original historical logs.
Process Documentation Included
Merkuron includes a pre-written process documentation (Verfahrensdokumentation) describing system operations, data backup, and architecture for official tax auditors.
Automatic TSE Failover Handling
If internet connectivity or cloud TSE services drop, the register automatically enters documented emergency mode. Receipts are marked as emergency bills and queued for re-signing.
Step-by-Step: Handling an Unannounced Tax Audit
During an unannounced German tax audit (§146b AO), Merkuron guides you through every step in seconds.
1. Auditor Identification
The tax auditor presents credentials and requests inspection of your register logs and DSFinV-K audit data for a specific period.
2. Open Export Menu
In the POS menu under Settings → Fiscal Memory, select the requested date range (e.g. current tax year or previous month).
3. Hand Over ZIP Archive
Click 'Export DSFinV-K' to generate the signed ZIP file, downloading it to a USB drive or secure local storage.
4. Present Process Documentation
Hand over the pre-built process documentation and manufacturer certificate included in Merkuron to prove KassenSichV compliance.
International VAT Support
In addition to German tax rules, Merkuron supports international VAT rates and European tax compliance requirements.
Germany (DE)
Standard 19% VAT (dine-in) and reduced 7% VAT (take-out / food items).
European Union
Built-in rate configurations for Austria (AT), Netherlands (NL), France (FR), Italy (IT), Spain (ES), and Poland (PL).
Tax Compliance Frequently Asked Questions (FAQ)
How do I handle an unannounced tax audit (Kassennachschau)?
Go to Settings → Fiscal Memory in the POS app and click 'Export DSFinV-K'. Enter the auditor's requested date range and hand over the generated ZIP archive.
How is the certified Cloud TSE connected to the register?
Cloud TSE connectivity under German §146a AO is fully integrated into the POS software, digitally signing every transaction before receipts are issued.
What happens if the internet drops during peak service hours?
The register continues processing sales locally. Issued receipts carry the legally required fallback notice. Signatures sync automatically once reconnected.
Is process documentation mandatory under German law?
GoBD regulations mandate clear process documentation. Merkuron provides a complete template that only requires adding your local business responsibilities.
Can orders be deleted silently without audit traces?
No. Under §146a AO compliance, silent deletions are strictly prohibited. Cancelled items are logged as counter-entries with full TSE signatures and staff timestamps.