Integrating an ERP system with KSeF step by step
Plan invoice submission and retrieval, divide responsibilities between accounting and IT, and verify the implementation after errors and restarts as well.
TechnologyOctober 15, 2026
News
Practical knowledge on KSeF - from integration basics to AI-driven invoice automation. Written from real deployments, not theory.
Articles and instructions
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How to invoice a company in the Netherlands
Does your Polish business supply services or ship goods to a Dutch customer? Learn when the buyer accounts for VAT, what a 0% intra-Community supply requires and how to deliver an invoice issued in KSeF.
International invoicesOctober 7, 2026
How to choose a CRM for your small business: contacts, deals and tasks
Keep customer information and next steps organized. Find out what your team should test before buying and how to prepare for the move from Excel.
PracticeOctober 2, 2026
ORLEN and KSeF. What do you get at checkout, and where is the actual invoice?
For a business purchase, the checkout confirmation helps you find the invoice in KSeF. We explain ORLEN S.A.'s procedure, the role of the QR code and how fleet billing differs.
PracticeOctober 1, 2026
Beyond Fakturownia. Other cyberattack announcements
Enel-med, PUZ in Suwałki, Zdrowit and Inowrocław alongside Fakturownia. What is known about the incidents, and what do they mean for customers and businesses?
AnalysisSeptember 30, 2026
Fakturownia data breach - what should you do?
What to check after the Fakturownia incident: passwords, API tokens, account access, and bank details on invoices. Findings and actions as of September 29, 2026.
PracticeSeptember 29, 2026
KSeF penalty deferral through 2027? What the Ministry plans
Poland plans to defer KSeF error penalties through 2027. We explain the proposal's legal status, current deadlines and impact on businesses.
AnalysisSeptember 23, 2026
PDF to KSeF XML converters with accounting integrations
Compare KSeFGPT, A-Cube and PDFdoKSEF connections and the formats used by Optima, Symfonia and InsERT. Choose a route your accountant can use.
Automation21 September 2026
KSeF software: monthly subscription or a one-time licence?
Understand the upfront price, renewals and the cost of keeping your invoicing software running for three years.
AutomationSeptember 18, 2026
Which KSeF software offers good value for a small business?
Compare 12-month costs, upfront payments, PDF limits and CRM value. See when a free tool is enough and which features justify paying more.
AutomationSeptember 18, 2026
Which KSeF software is best for a small business?
Find out when a free application is enough and when accounting, CRM or PDF imports can help. Compare features and costs.
AutomationSeptember 18, 2026
How to send a sales invoice PDF to a fixed team email address?
Configure an email with a PDF of each new outgoing KSeF invoice. Set a fixed team inbox, choose the language and verify the saved workflow.
InstructionsSeptember 17, 2026
Frequently asked questions (FAQ)
Short answers about the KSeFGPT app and about the National e-Invoice System itself, with links to the full articles.
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