Connect to Fakturoid.cz by clicking the "Connect to Fakturoid" button on the Home page.
2. Login to your Fakturoid account.
3. Grant access to the Shopify Fakturoid app by clicking the yellow button.
4. After a few seconds, you will be connected and redirected back to the Shopify app.
5. Go to Settings/Invoicing rules to set when exactly the invoice should be created.
And that's the most important part done.