Practical knowledge on KSeF - from integration basics to AI-driven invoice automation. Written from real deployments, not theory.
Connect a Fakturownia.pl account to the selected company in KSeFGPT, verify the access details, and save an active integration. You will need the account subdomain and a Fakturownia API token.
Compare submission limits, retrieval, alerts, AI, workflows and team access in KSeF invoicing options available for PLN 0.
Create a conversation for a selected company, connect it to KSeF, and ask about a tax ruling, a correction, or your own invoices. You need a plan that includes Chat and a KSeF token or certificate.
Open CRM > Counterparties, add a company and check its detail page. This guide follows the current CRM form.
See when changing the payment date leads to a corrective invoice and why the tax interpretation of July 10, 2026 does not provide a completely unambiguous answer.
As the buyer, issue an invoice on the seller's behalf, mark it as self-billing and submit it to KSeF. Before you start, you need an agreement with the seller and the appropriate KSeF permissions.
Add a company under Settings, fetch its details from GUS using its NIP, and check the new entry under Your companies. The company name and NIP are enough to create it.
Create or edit a group, select the permitted operations, and assign the group to an active organization member. The access change takes effect immediately.
Invite a user by email, assign a permission group, and ask them to accept the invitation. They become an active organization member only after accepting it in their account.
Download a Ukrainian PDF, check the data and give a readable invoice version to a counterparty or Ukrainian-speaking finance team.
Add a subordinate local government unit as a separate Podmiot3 entity and select the official role 8.
Add PDF invoices one by one to a shared queue, wait for KSeFGPT to prepare the XML files and check the separate documents in Drafts. You select one file at a time, but you do not need to wait for the previous file to finish processing.
Short answers about the KSeFGPT app and about the National e-Invoice System itself, with links to the full articles.
Leave us a message if you'd like to discuss a specific topic or receive a newsletter about KSeF automation.
Ask about a topicWe've prepared texts in languages: English, Polski, Deutsch, Українська. Your chosen language is saved in the blog tab.