TSS/Tax System

The TSS (Technical Security System) ensures compliance with German tax regulations (KassenSichV). Every transaction is digitally signed and recorded for tax authority verification.

What is TSS/TSE?

TSE (Technische Sicherheitseinrichtung) is required by German law for all electronic cash registers. It provides:

• Digital signatures for every transaction
• Tamper-proof records of all sales
• QR codes on receipts for verification
• Export capability for tax audits

Legal Requirement

Since January 2020, all German businesses with electronic cash registers must:

1. Use a certified TSE
2. Sign all transactions digitally
3. Provide QR codes on receipts
4. Export data in DSFINV-K format on request

Fleksa POS includes built-in TSS compliance via Fiskaly.

TSS Status

Check your TSS status in Settings > TSS:

Viewing TSE Information

The TSS screen shows:

• TSE Serial Number - Unique identifier
• Certificate Info - Validity and issuer
• Signature Counter - Number of signed transactions
• Last Transaction - Most recent signed receipt

Transaction Signing

Every transaction is automatically:

1. Sent to the TSE for signing
2. Assigned a signature counter
3. Given a unique signature value
4. Recorded with timestamp

This happens in the background - no staff action needed.

Receipt QR Codes

Each receipt includes a QR code containing:

• Transaction signature
• Signature counter
• TSE serial number
• Transaction timestamp
• Verification data

Customers and tax authorities can scan to verify authenticity.

DSFINV-K Export

For tax audits, export transaction data:

Step 1: Go to Settings > TSS > Reports

Step 2: Select date range

Step 3: Tap Export DSFINV-K

Step 4: Download the export file

The export includes all required data in the official German tax format.

Daily Closing (Z-Report)

Generate daily closing reports:

Step 1: At end of day, go to TSS > Cash Point Closings

Step 2: Review the daily summary

Step 3: Print or save the Z-Report

Z-Reports include:

• Total transactions
• Sales by payment method
• Tax breakdown
• Signed closing signature

TSS Reports

View transaction reports:

• Daily Reports - Transactions for today
• Period Reports - Custom date ranges
• Cash Point Closings - Daily closing summaries
• Signature Log - All signed transactions

Troubleshooting

TSE Not Connected:

1. Check internet connection
2. Verify Fiskaly credentials
3. Contact support if persistent

Signing Failed:

1. Check TSE status
2. Retry the transaction
3. Report error to support

Export Issues:

1. Ensure date range is valid
2. Check for pending transactions
3. Try smaller date ranges

Compliance Tips

Daily:

• Verify TSE is active at shift start
• Check for any signing errors
• Complete daily closing

Monthly:

• Review TSS reports
• Archive monthly exports
• Check for any gaps

For Audits:

• Keep all Z-Reports accessible
• Know how to export DSFINV-K
• Maintain backup of exports

Support

For TSS-related issues:

1. Check TSS status in settings
2. Review error messages
3. Contact Fleksa support with:
   • TSE serial number
   • Error description
   • Time of issue

TSS compliance is critical - address any issues immediately.