After installation, the app connects your Shopify store with your Fakturownia account. Every new order can be auto-converted into an invoice or receipt with correct VAT, numbering, and customer data, so you never copy data manually. PDFs are sent to buyers automatically. The Shopify admin shows document status, lets you download it, create credit notes, and manage discounts, returns, and multiple currencies.If you need specific functionalities or individual solutions, we will be happy to help.