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Luno-Group Knowledge Hub

Taxation Demystified. We share expertise, clarify legal complexities, and help prepare your business for imminent legislative changes.

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September 29, 2025
3 min read

Your Company & KSeF

Your Company & KSeF: A Checklist to See if the Obligation Applies to You The implementation of KSeF is a…

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September 28, 2025
3 min read

Who is Affected by KSeF?

Who is Affected by Mandatory KSeF? A List of Taxpayers and Exemptions for 2026 The implementation of KSeF is one…

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September 28, 2025
3 min read

Invoices with Attachments in KSeF

Who Can and How to Apply to Use This Feature? The standard e-invoice in the National e-Invoicing System (KSeF) has…

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September 28, 2025
4 min read

Issuing Invoices in KSeF

How to Issue Your First Invoice in KSeF: A Practical Guide for Small Business The mandatory National e-Invoicing System (KSeF)…

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September 27, 2025
4 min read

Authentication in KSeF

Seal, Signature, Token, or Certificate? What to Choose for Your Company? One of the first technical steps you need to…

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September 26, 2025
3 min read

Managing KSeF Permissions

How to Add an Employee or Accounting Office to the System The National e-Invoicing System (KSeF) is more than an…

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September 26, 2025
4 min read

KSeF Failure or No Internet: How to Issue Offline Invoices

How to Issue Invoices in Offline Mode The implementation of the National e-Invoicing System (KSeF) relies on constant internet access…

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September 26, 2025
4 min read

What Is a KSeF e-Invoice?

Key Differences Compared to PDF and Paper Invoices For years, we have been accustomed to invoices in paper form or…

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September 26, 2025
4 min read

KSeF System Failure, Consumer Invoices & Payments: FAQ

The implementation of KSeF raises many practical questions. For example, what happens in a KSeF system failure? How do you…

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September 26, 2025
4 min read

KSeF and accounting office

How Will Cooperation with Your Accountant Change? The mandatory KSeF is a revolution not only in invoicing but also in…

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September 25, 2025
3 min read

Correcting an Invoice in KSeF

How to Fix a Mistake After Sending a Document Sending an invoice to the National e-Invoicing System (KSeF) is the…

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September 25, 2025
4 min read

Tax on Crypto and Stocks

How to Settle Profits on Your Annual PIT Return in 2025 Investing is becoming more popular, and with it come…

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