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If you want to send and receive Polish e-invoices, you will need to connect Billit with KSeF, the National e-Invoice System of Poland.

First you will need to identify yourself and then generate a unique API token to connect KSeF and Billit.

Follow the steps below to get started.

Authenticate with the National System of e-Invoices

1. Go to the website of the National e-Invoice System
2. Click the “Authenticate in the National System of e-Invoices” tab.
3. Fill in the 'Company NIP number' (Tax Identification Number) and click 'Authenticate'
4. In the next step, choose 'Qualified certificate'. Make sure the option 'Yes' is checked to the question 'Is the certificate a signature with an NIP or PESEL number?' and click 'Next'
5. Now choose 'Stamp with NIP' from the dropdown under 'Authentication for testing'. Enter the same 'NIP number' as before. Now confirm by clicking the 'Authenticate to the test application' button

Generate a KSeF token

1. After a few seconds and when the authorization is successful, you will receive a session number.
2. Close the pop-up, choose 'Tokens' from the left hand side and then select 'Generate Token'.
3. Fill in a 'Customer Token name' (minium 5 characters) and choose the assigned role. In this case it is 'Select the role to which the token is assigned'.
4. When you're ready, confirm by clicking the 'Generate token' button.
5. Copy and store your unique token safely.

You can revoke a token manually from the 'token list' in the left hand menu. Select the tokens and click 'Revoke'.

Connect Billit and KSeF

1. Go to your Billit account and log in
2. Go to "Settings" > "Integrations" and look for the "KSeF" tile
3. Click on the "Available" button. You will now need to fill in three fields:
   1. Token: copy the token you just saved
   2. Identification: Fill in your NIP number
   3. Identification type: Enter 'onip'
4. Confirm by clicking the "Save" button.

KSeF and Billit are now connected. You can start sending your first invoice.