Guides
Step by step through KSeF and e-invoices.
Receiving invoices in KSeF: nothing to accept
An invoice with your NIP reaches you in KSeF on its own, with nothing to accept. It counts as received on the day KSeF assigns its number.
Your first real invoice in the KSeF Taxpayer App
How to issue a real KSeF invoice for free, without software: login, form, KSeF number and UPO. For businesses with a few invoices a month.
KSeF outage: what to do and when to send
A KSeF outage does not stop invoicing: offline24, emergency mode, unavailability and total failure. Send deadlines and what the buyer gets.
KSeF login: Profil Zaufany or qualified signature
Log in to KSeF with Profil Zaufany via login.gov.pl or a qualified signature. KSeF tokens and certificates are for invoicing software, not for you.
Giving your accountant KSeF access: step by step
You grant access online in the KSeF Taxpayer Application: to the firm by NIP or to the accountant by name. ZAW-FA is needed only in narrow cases.
KSeF test invoice: try it before you go live
A dummy invoice in the KSeF test environment: send it, get the UPO and check it on the buyer's side. No legal effect, about 15 minutes.