KSeF Configuration

Introduction

Authorization in KSeF requires generating a certificate in the Ministry of Finance system. This certificate allows the mobile-calendar application to communicate securely with the National e-Invoicing System (KSeF).

Instructions

Generating a KSeF certificate

• Go to the KSeF Taxpayer Application page on the Ministry of Finance website.

• Log in to the system using an available login method (for example, Trusted Profile or a qualified electronic signature).

• In the left-hand menu, select the Certificates tab.

• Then click Request a certificate.

• In the Certificate name field, enter any name under which the private key and certificate will be saved.

• In the Password field, enter a password to protect the certificate. The password must meet the following requirements:

  • minimum 15 characters, at least 1 uppercase letter, at least 1 lowercase letter, at least 1 digit, at least 1 special character.

  • In the Repeat password field, re-enter the same password to confirm it.

• Click the Generate button.

• After generating the private key, the system will display a screen confirming its creation.

• In the Certificate purpose section, select Authentication in the KSeF system.

• In the Certificate valid from field, set the certificate start date. The certificate will be valid for 2 years from the indicated date.

• Click Submit the application for certificate issuance.

• The system will send the request to the National e-Invoicing System (KSeF) to generate the certificate.

• After the request is successfully submitted, the system will display a message confirming that the certificate generation process has been completed.

• Click Download certificate to save the certificate on your device.

• Save the downloaded certificate file in a secure place - you will need it to configure the KSeF integration in the mobile-calendar application.

Connecting mobile-calendar to KSeF

• Log in to the mobile-calendar application.

• From the left-hand menu, click Integrations -> Other -> KSeF.

• In the KSeF certificate field, click Select certificate file and choose the previously downloaded certificate file.

• In the Private key field, click Select key file and choose the saved private key file.

• In the Private key password field, enter the password set when generating the certificate.

• In the NIP field, enter the taxpayer's NIP number for which the connection to KSeF is to be configured.

• After completing all required fields, click Save certificate.

• Once the certificate is saved successfully, the integration will be activated.

• In the KSeF Configuration section, the status Connected to KSeF will appear, indicating an active connection via a qualified certificate. In this view, you will also see basic information about the saved certificate, such as:

  • NIP,

  • certificate expiration date.

• If needed, you can click Replace certificate to upload a new certificate, for example after renewing it.

• Below, in the Invoice submission mode section, choose how invoices should be sent to KSeF after they are issued. There are 2 available options:

  • Manual submission - after issuing an invoice, you can review it before sending it to KSeF; sending requires manually clicking a button,

  • Automatic submission - the invoice is sent to KSeF automatically immediately after issuance, without any additional confirmation.

• Choose the mode that best matches how work is organized at the property.